feat: migrate from Cedar to SpiceDB authorization system

This is a major architectural change that replaces the Cedar policy-based
authorization system with SpiceDB's relation-based authorization.

Key changes:

- Migrate from Rust to Go implementation
- Replace Cedar policies with SpiceDB schema and relationships
- Switch from envoy `ext_authz` with Cedar to SpiceDB permission checks
- Update build system and dependencies for Go ecosystem
- Maintain Envoy integration for external authorization

This change enables more flexible permission modeling through SpiceDB's
Google Zanzibar inspired relation-based system, supporting complex
hierarchical permissions that were difficult to express in Cedar.

Breaking change: Existing Cedar policies and Rust-based configuration
will no longer work and need to be migrated to SpiceDB schema.

1 files changed, 0 insertions, 258 deletions

diff --git a/vendor/unicode-width/src/lib.rs b/vendor/unicode-width/src/lib.rs
deleted file mode 100644
index 71b5d702..00000000
--- a/vendor/unicode-width/src/lib.rs
+++ /dev/null
@@ -1,258 +0,0 @@
-// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! Determine displayed width of `char` and `str` types according to
-//! [Unicode Standard Annex #11](http://www.unicode.org/reports/tr11/)
-//! and other portions of the Unicode standard.
-//! See the [Rules for determining width](#rules-for-determining-width) section
-//! for the exact rules.
-//!
-//! This crate is `#![no_std]`.
-//!
-//! ```rust
-//! use unicode_width::UnicodeWidthStr;
-//!
-//! let teststr = "Ｈｅｌｌｏ, ｗｏｒｌｄ!";
-//! let width = UnicodeWidthStr::width(teststr);
-//! println!("{}", teststr);
-//! println!("The above string is {} columns wide.", width);
-//! ```
-//!
-//! # `"cjk"` feature flag
-//!
-//! This crate has one Cargo feature flag, `"cjk"`
-//! (enabled by default).
-//! It enables the [`UnicodeWidthChar::width_cjk`]
-//! and [`UnicodeWidthStr::width_cjk`],
-//! which perform an alternate width calculation
-//! more suited to CJK contexts. The flag also unseals the
-//! [`UnicodeWidthChar`] and [`UnicodeWidthStr`] traits.
-//!
-//! Disabling the flag (with `no_default_features` in `Cargo.toml`)
-//! will reduce the amount of static data needed by the crate.
-//!
-//! ```rust
-//! use unicode_width::UnicodeWidthStr;
-//!
-//! let teststr = "“𘀀”";
-//! assert_eq!(teststr.width(), 4);
-//!
-//! #[cfg(feature = "cjk")]
-//! assert_eq!(teststr.width_cjk(), 6);
-//! ```
-//!
-//! # Rules for determining width
-//!
-//! This crate currently uses the following rules to determine the width of a
-//! character or string, in order of decreasing precedence. These may be tweaked in the future.
-//!
-//! 1. In the following cases, the width of a string differs from the sum of the widths of its constituent characters:
-//!    - The sequence `"\r\n"` has width 1.
-//!    - Emoji-specific ligatures:
-//!      - Well-formed, fully-qualified [emoji ZWJ sequences] have width 2.
-//!      - [Emoji modifier sequences] have width 2.
-//!      - [Emoji presentation sequences] have width 2.
-//!      - Outside of an East Asian context, [text presentation sequences] have width 1 if their base character:
-//!        - Has the [`Emoji_Presentation`] property, and
-//!        - Is not in the [Enclosed Ideographic Supplement] block.
-//!    - Script-specific ligatures:
-//!      - For all the following ligatures, the insertion of any number of [default-ignorable][`Default_Ignorable_Code_Point`]
-//!        [combining marks] anywhere in the sequence will not change the total width. In addition, for all non-Arabic
-//!        ligatures, the insertion of any number of [`'\u{200D}'` ZERO WIDTH JOINER](https://www.unicode.org/versions/Unicode15.0.0/ch23.pdf#G23126)s
-//!        will not affect the width.
-//!      - **[Arabic]**: A character sequence consisting of one character with [`Joining_Group`]`=Lam`,
-//!        followed by any number of characters with [`Joining_Type`]`=Transparent`, followed by one character
-//!        with [`Joining_Group`]`=Alef`, has total width 1. For example: `لا`‎, `لآ`‎, `ڸا`‎, `لٟٞأ`
-//!      - **[Buginese]**: `"\u{1A15}\u{1A17}\u{200D}\u{1A10}"` (<a, -i> ya, `ᨕᨗ‍ᨐ`) has total width 1.
-//!      - **[Hebrew]**: `"א\u{200D}ל"` (Alef-Lamed, `א‍ל`) has total width 1.
-//!      - **[Khmer]**: Coeng signs consisting of `'\u{17D2}'` followed by a character in
-//!        `'\u{1780}'..='\u{1782}' | '\u{1784}'..='\u{1787}' | '\u{1789}'..='\u{178C}' | '\u{178E}'..='\u{1793}' | '\u{1795}'..='\u{1798}' | '\u{179B}'..='\u{179D}' | '\u{17A0}' | '\u{17A2}'  | '\u{17A7}' | '\u{17AB}'..='\u{17AC}' | '\u{17AF}'`
-//!        have width 0.
-//!      - **[Lisu]**: Tone letter combinations consisting of a character in the range `'\u{A4F8}'..='\u{A4FB}'`
-//!        followed by a character in the range `'\u{A4FC}'..='\u{A4FD}'` have width 1. For example: `ꓹꓼ`
-//!      - **[Old Turkic]**: `"\u{10C32}\u{200D}\u{10C03}"` (`𐰲‍𐰃`) has total width 1.
-//!      - **[Tifinagh]**: A sequence of a Tifinagh consonant in the range `'\u{2D31}'..='\u{2D65}' | '\u{2D6F}'`, followed by either
-//!        [`'\u{2D7F}'` TIFINAGH CONSONANT JOINER] or `'\u{200D}'`, followed by another Tifinangh consonant, has total width 1.
-//!        For example: `ⵏ⵿ⴾ`
-//!    - In an East Asian context only, `<`, `=`, or `>` have width 2 when followed by [`'\u{0338}'` COMBINING LONG SOLIDUS OVERLAY].
-//!      The two characters may be separated by any number of characters whose canonical decompositions consist only of characters meeting
-//!      one of the following requirements:
-//!      - Has [`Canonical_Combining_Class`] greater than 1, or
-//!      - Is a [default-ignorable][`Default_Ignorable_Code_Point`] [combining mark][combining marks].
-//! 2. In all other cases, the width of the string equals the sum of its character widths:
-//!    1. [`'\u{2D7F}'` TIFINAGH CONSONANT JOINER] has width 1 (outside of the ligatures described previously).
-//!    2. [`'\u{115F}'` HANGUL CHOSEONG FILLER](https://util.unicode.org/UnicodeJsps/character.jsp?a=115F) and
-//!       [`'\u{17A4}'` KHMER INDEPENDENT VOWEL QAA](https://util.unicode.org/UnicodeJsps/character.jsp?a=17A4) have width 2.
-//!    3. [`'\u{17D8}'` KHMER SIGN BEYYAL](https://util.unicode.org/UnicodeJsps/character.jsp?a=17D8) has width 3.
-//!    4. The following have width 0:
-//!       - [Characters](https://util.unicode.org/UnicodeJsps/list-unicodeset.jsp?a=%5Cp%7BDefault_Ignorable_Code_Point%7D)
-//!         with the [`Default_Ignorable_Code_Point`] property.
-//!       - [Characters](https://util.unicode.org/UnicodeJsps/list-unicodeset.jsp?a=%5Cp%7BGrapheme_Extend%7D)
-//!         with the [`Grapheme_Extend`] property.
-//!       - The following 8 characters, all of which have NFD decompositions consisting of two [`Grapheme_Extend`] characters:
-//!         - [`'\u{0CC0}'` KANNADA VOWEL SIGN II](https://util.unicode.org/UnicodeJsps/character.jsp?a=0CC0),
-//!         - [`'\u{0CC7}'` KANNADA VOWEL SIGN EE](https://util.unicode.org/UnicodeJsps/character.jsp?a=0CC7),
-//!         - [`'\u{0CC8}'` KANNADA VOWEL SIGN AI](https://util.unicode.org/UnicodeJsps/character.jsp?a=0CC8),
-//!         - [`'\u{0CCA}'` KANNADA VOWEL SIGN O](https://util.unicode.org/UnicodeJsps/character.jsp?a=0CCA),
-//!         - [`'\u{0CCB}'` KANNADA VOWEL SIGN OO](https://util.unicode.org/UnicodeJsps/character.jsp?a=0CCB),
-//!         - [`'\u{1B3B}'` BALINESE VOWEL SIGN RA REPA TEDUNG](https://util.unicode.org/UnicodeJsps/character.jsp?a=1B3B),
-//!         - [`'\u{1B3D}'` BALINESE VOWEL SIGN LA LENGA TEDUNG](https://util.unicode.org/UnicodeJsps/character.jsp?a=1B3D), and
-//!         - [`'\u{1B43}'` BALINESE VOWEL SIGN PEPET TEDUNG](https://util.unicode.org/UnicodeJsps/character.jsp?a=1B43).
-//!       - [Characters](https://util.unicode.org/UnicodeJsps/list-unicodeset.jsp?a=%5Cp%7BHangul_Syllable_Type%3DV%7D%5Cp%7BHangul_Syllable_Type%3DT%7D)
-//!         with a [`Hangul_Syllable_Type`] of `Vowel_Jamo` (`V`) or `Trailing_Jamo` (`T`).
-//!       - The following [`Prepended_Concatenation_Mark`]s:
-//!         - [`'\u{0605}'` NUMBER MARK ABOVE](https://util.unicode.org/UnicodeJsps/character.jsp?a=0605),
-//!         - [`'\u{070F}'` SYRIAC ABBREVIATION MARK](https://util.unicode.org/UnicodeJsps/character.jsp?a=070F),
-//!         - [`'\u{0890}'` POUND MARK ABOVE](https://util.unicode.org/UnicodeJsps/character.jsp?a=0890),
-//!         - [`'\u{0891}'` PIASTRE MARK ABOVE](https://util.unicode.org/UnicodeJsps/character.jsp?a=0891), and
-//!         - [`'\u{08E2}'` DISPUTED END OF AYAH](https://util.unicode.org/UnicodeJsps/character.jsp?a=08E2).
-//!       - [Characters](https://util.unicode.org/UnicodeJsps/list-unicodeset.jsp?a=%5Cp%7BGrapheme_Cluster_Break%3DPrepend%7D-%5Cp%7BPrepended_Concatenation_Mark%7D)
-//!         with the [`Grapheme_Extend=Prepend`] property, that are not also [`Prepended_Concatenation_Mark`]s.
-//!       - [`'\u{A8FA}'` DEVANAGARI CARET](https://util.unicode.org/UnicodeJsps/character.jsp?a=A8FA).
-//!    5. [Characters](https://util.unicode.org/UnicodeJsps/list-unicodeset.jsp?a=%5Cp%7BEast_Asian_Width%3DF%7D%5Cp%7BEast_Asian_Width%3DW%7D)
-//!       with an [`East_Asian_Width`] of [`Fullwidth`] or [`Wide`] have width 2.
-//!    6. Characters fulfilling all of the following conditions have width 2 in an East Asian context, and width 1 otherwise:
-//!       - Has an [`East_Asian_Width`] of [`Ambiguous`], or
-//!         has a canonical decomposition to an [`Ambiguous`] character followed by [`'\u{0338}'` COMBINING LONG SOLIDUS OVERLAY], or
-//!         is [`'\u{0387}'` GREEK ANO TELEIA](https://util.unicode.org/UnicodeJsps/character.jsp?a=0387), and
-//!       - Does not have a [`General_Category`] of `Letter` or `Modifier_Symbol`.
-//!    7. All other characters have width 1.
-//!
-//! [`'\u{0338}'` COMBINING LONG SOLIDUS OVERLAY]: https://util.unicode.org/UnicodeJsps/character.jsp?a=0338
-//! [`'\u{2D7F}'` TIFINAGH CONSONANT JOINER]: https://util.unicode.org/UnicodeJsps/character.jsp?a=2D7F
-//!
-//! [`Canonical_Combining_Class`]: https://www.unicode.org/versions/Unicode15.0.0/ch03.pdf#G50313
-//! [`Default_Ignorable_Code_Point`]: https://www.unicode.org/versions/Unicode15.0.0/ch05.pdf#G40095
-//! [`East_Asian_Width`]: https://www.unicode.org/reports/tr11/#ED1
-//! [`Emoji_Presentation`]: https://unicode.org/reports/tr51/#def_emoji_presentation
-//! [`General_Category`]: https://www.unicode.org/versions/Unicode15.0.0/ch04.pdf#G124142
-//! [`Grapheme_Extend=Prepend`]: https://www.unicode.org/reports/tr29/#Prepend
-//! [`Grapheme_Extend`]: https://www.unicode.org/versions/Unicode15.0.0/ch03.pdf#G52443
-//! [`Hangul_Syllable_Type`]: https://www.unicode.org/versions/Unicode15.0.0/ch03.pdf#G45593
-//! [`Joining_Group`]: https://www.unicode.org/versions/Unicode14.0.0/ch09.pdf#G36862
-//! [`Joining_Type`]: http://www.unicode.org/versions/Unicode15.0.0/ch09.pdf#G50009
-//! [`Prepended_Concatenation_Mark`]: https://www.unicode.org/versions/Unicode15.0.0/ch23.pdf#G37908
-//! [`Script`]: https://www.unicode.org/reports/tr24/#Script
-//!
-//! [`Fullwidth`]: https://www.unicode.org/reports/tr11/#ED2
-//! [`Wide`]: https://www.unicode.org/reports/tr11/#ED4
-//! [`Ambiguous`]: https://www.unicode.org/reports/tr11/#ED6
-//!
-//! [combining marks]: https://www.unicode.org/versions/Unicode15.0.0/ch03.pdf#G30602
-//!
-//! [emoji ZWJ sequences]: https://www.unicode.org/reports/tr51/#def_emoji_sequence
-//! [Emoji modifier sequences]: https://www.unicode.org/reports/tr51/#def_emoji_modifier_sequence
-//! [Emoji presentation sequences]: https://unicode.org/reports/tr51/#def_emoji_presentation_sequence
-//! [text presentation sequences]: https://unicode.org/reports/tr51/#def_text_presentation_sequence
-//!
-//! [Enclosed Ideographic Supplement]: https://unicode.org/charts/nameslist/n_1F200.html
-//!
-//! [Arabic]: https://www.unicode.org/versions/Unicode15.0.0/ch09.pdf#G7480
-//! [Buginese]: https://www.unicode.org/versions/Unicode15.0.0/ch17.pdf#G26743
-//! [Hebrew]: https://www.unicode.org/versions/Unicode15.0.0/ch09.pdf#G6528
-//! [Khmer]: https://www.unicode.org/versions/Unicode15.0.0/ch16.pdf#G64642
-//! [Lisu]: https://www.unicode.org/versions/Unicode15.0.0/ch18.pdf#G44587
-//! [Old Turkic]: https://www.unicode.org/versions/Unicode15.0.0/ch14.pdf#G41975
-//! [Tifinagh]: http://www.unicode.org/versions/Unicode15.0.0/ch19.pdf#G43184
-//!
-//!
-//! ## Canonical equivalence
-//!
-//! Canonically equivalent strings are assigned the same width (CJK and non-CJK).
-
-#![forbid(unsafe_code)]
-#![deny(missing_docs)]
-#![doc(
-    html_logo_url = "https://unicode-rs.github.io/unicode-rs_sm.png",
-    html_favicon_url = "https://unicode-rs.github.io/unicode-rs_sm.png"
-)]
-#![no_std]
-
-pub use tables::UNICODE_VERSION;
-
-mod tables;
-
-mod private {
-    pub trait Sealed {}
-    #[cfg(not(feature = "cjk"))]
-    impl Sealed for char {}
-    #[cfg(not(feature = "cjk"))]
-    impl Sealed for str {}
-    #[cfg(feature = "cjk")]
-    impl<T: ?Sized> Sealed for T {}
-}
-
-/// Methods for determining displayed width of Unicode characters.
-pub trait UnicodeWidthChar: private::Sealed {
-    /// Returns the character's displayed width in columns, or `None` if the
-    /// character is a control character.
-    ///
-    /// This function treats characters in the Ambiguous category according
-    /// to [Unicode Standard Annex #11](http://www.unicode.org/reports/tr11/)
-    /// as 1 column wide. This is consistent with the recommendations for non-CJK
-    /// contexts, or when the context cannot be reliably determined.
-    fn width(self) -> Option<usize>;
-
-    /// Returns the character's displayed width in columns, or `None` if the
-    /// character is a control character.
-    ///
-    /// This function treats characters in the Ambiguous category according
-    /// to [Unicode Standard Annex #11](http://www.unicode.org/reports/tr11/)
-    /// as 2 columns wide. This is consistent with the recommendations for
-    /// CJK contexts.
-    #[cfg(feature = "cjk")]
-    fn width_cjk(self) -> Option<usize>;
-}
-
-impl UnicodeWidthChar for char {
-    #[inline]
-    fn width(self) -> Option<usize> {
-        tables::single_char_width(self)
-    }
-
-    #[cfg(feature = "cjk")]
-    #[inline]
-    fn width_cjk(self) -> Option<usize> {
-        tables::single_char_width_cjk(self)
-    }
-}
-
-/// Methods for determining displayed width of Unicode strings.
-pub trait UnicodeWidthStr: private::Sealed {
-    /// Returns the string's displayed width in columns.
-    ///
-    /// This function treats characters in the Ambiguous category according
-    /// to [Unicode Standard Annex #11](http://www.unicode.org/reports/tr11/)
-    /// as 1 column wide. This is consistent with the recommendations for
-    /// non-CJK contexts, or when the context cannot be reliably determined.
-    fn width(&self) -> usize;
-
-    /// Returns the string's displayed width in columns.
-    ///
-    /// This function treats characters in the Ambiguous category according
-    /// to [Unicode Standard Annex #11](http://www.unicode.org/reports/tr11/)
-    /// as 2 column wide. This is consistent with the recommendations for
-    /// CJK contexts.
-    #[cfg(feature = "cjk")]
-    fn width_cjk(&self) -> usize;
-}
-
-impl UnicodeWidthStr for str {
-    #[inline]
-    fn width(&self) -> usize {
-        tables::str_width(self)
-    }
-
-    #[cfg(feature = "cjk")]
-    #[inline]
-    fn width_cjk(&self) -> usize {
-        tables::str_width_cjk(self)
-    }
-}