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, 54 deletions

diff --git a/vendor/tinyvec/src/array.rs b/vendor/tinyvec/src/array.rs
deleted file mode 100644
index 79bbc7cf..00000000
--- a/vendor/tinyvec/src/array.rs
+++ /dev/null
@@ -1,54 +0,0 @@
-/// A trait for types that are an array.

-///

-/// An "array", for our purposes, has the following properties:

-/// * Owns some number of elements.

-/// * The element type can be generic, but must implement [`Default`].

-/// * The capacity is fixed at compile time, based on the implementing type.

-/// * You can get a shared or mutable slice to the elements.

-///

-/// You are generally **not** expected to need to implement this yourself. It is

-/// already implemented for all the major array lengths (`0..=32` and the powers

-/// of 2 up to 4,096), or for all array lengths with the feature `rustc_1_55`.

-///

-/// **Additional lengths can easily be added upon request.**

-///

-/// ## Safety Reminder

-///

-/// Just a reminder: this trait is 100% safe, which means that `unsafe` code

-/// **must not** rely on an instance of this trait being correct.

-pub trait Array {

-  /// The type of the items in the thing.

-  type Item: Default;

-

-  /// The number of slots in the thing.

-  const CAPACITY: usize;

-

-  /// Gives a shared slice over the whole thing.

-  ///

-  /// A correct implementation will return a slice with a length equal to the

-  /// `CAPACITY` value.

-  fn as_slice(&self) -> &[Self::Item];

-

-  /// Gives a unique slice over the whole thing.

-  ///

-  /// A correct implementation will return a slice with a length equal to the

-  /// `CAPACITY` value.

-  fn as_slice_mut(&mut self) -> &mut [Self::Item];

-

-  /// Create a default-initialized instance of ourself, similar to the

-  /// [`Default`] trait, but implemented for the same range of sizes as

-  /// [`Array`].

-  fn default() -> Self;

-}

-

-#[cfg(all(feature = "generic-array", not(feature = "rustc_1_55")))]

-core::compile_error!("generic-array requires `rustc_1_55` feature");

-

-#[cfg(feature = "rustc_1_55")]

-mod const_generic_impl;

-

-#[cfg(not(feature = "rustc_1_55"))]

-mod generated_impl;

-

-#[cfg(feature = "generic-array")]

-mod generic_array_impl;