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, 33 deletions

diff --git a/vendor/bitflags/src/external/arbitrary.rs b/vendor/bitflags/src/external/arbitrary.rs
deleted file mode 100644
index edde9b5e..00000000
--- a/vendor/bitflags/src/external/arbitrary.rs
+++ /dev/null
@@ -1,33 +0,0 @@
-//! Specialized fuzzing for flags types using `arbitrary`.
-
-use crate::Flags;
-
-/**
-Generate some arbitrary flags value with only known bits set.
-*/
-pub fn arbitrary<'a, B: Flags>(u: &mut arbitrary::Unstructured<'a>) -> arbitrary::Result<B>
-where
-    B::Bits: arbitrary::Arbitrary<'a>,
-{
-    B::from_bits(u.arbitrary()?).ok_or(arbitrary::Error::IncorrectFormat)
-}
-
-#[cfg(test)]
-mod tests {
-    use arbitrary::Arbitrary;
-
-    bitflags! {
-        #[derive(Arbitrary)]
-        struct Color: u32 {
-            const RED = 0x1;
-            const GREEN = 0x2;
-            const BLUE = 0x4;
-        }
-    }
-
-    #[test]
-    fn test_arbitrary() {
-        let mut unstructured = arbitrary::Unstructured::new(&[0_u8; 256]);
-        let _color = Color::arbitrary(&mut unstructured);
-    }
-}