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, 89 deletions

diff --git a/vendor/overload/tests/assignment.rs b/vendor/overload/tests/assignment.rs
deleted file mode 100644
index 9657b4bd..00000000
--- a/vendor/overload/tests/assignment.rs
+++ /dev/null
@@ -1,89 +0,0 @@
-extern crate overload;

-use overload::overload;

-use std::ops;

-

-#[derive(PartialEq, Debug)]

-struct A(i32);

-

-#[derive(PartialEq, Debug)]

-struct B(i32);

-

-overload!((a: &mut A) += (b: B) { a.0 += b.0; });

-#[test]

-fn add_assign() {

-    let mut a = A(3);

-    a += B(4);

-    assert_eq!(A(3 + 4), a);

-}

-

-overload!((a: &mut A) -= (b: B) { a.0 -= b.0; });

-#[test]

-fn sub_assign() {

-    let mut a = A(3);

-    a -= B(4);

-    assert_eq!(A(3 - 4), a);

-}

-

-overload!((a: &mut A) *= (b: B) { a.0 *= b.0; });

-#[test]

-fn mul_assign() {

-    let mut a = A(3);

-    a *= B(4);

-    assert_eq!(A(3 * 4), a);

-}

-

-overload!((a: &mut A) /= (b: B) { a.0 /= b.0; });

-#[test]

-fn div_assign() {

-    let mut a = A(6);

-    a /= B(3);

-    assert_eq!(A(6 / 3), a);

-}

-

-overload!((a: &mut A) %= (b: B) { a.0 %= b.0; });

-#[test]

-fn rem_assign() {

-    let mut a = A(6);

-    a %= B(4);

-    assert_eq!(A(6 % 4), a);

-}

-

-overload!((a: &mut A) &= (b: B) { a.0 &= b.0; });

-#[test]

-fn bitand_assign() {

-    let mut a = A(6);

-    a &= B(4);

-    assert_eq!(A(6 & 4), a);

-}

-

-overload!((a: &mut A) |= (b: B) { a.0 |= b.0; });

-#[test]

-fn bitor_assign() {

-    let mut a = A(6);

-    a |= B(4);

-    assert_eq!(A(6 | 4), a);

-}

-

-overload!((a: &mut A) ^= (b: B) { a.0 ^= b.0; });

-#[test]

-fn bitxor_assign() {

-    let mut a = A(6);

-    a ^= B(4);

-    assert_eq!(A(6 ^ 4), a);

-}

-

-overload!((a: &mut A) <<= (b: B) { a.0 <<= b.0; });

-#[test]

-fn shl_assign() {

-    let mut a = A(6);

-    a <<= B(4);

-    assert_eq!(A(6 << 4), a);

-}

-

-overload!((a: &mut A) >>= (b: B) { a.0 >>= b.0; });

-#[test]

-fn shr_assign() {

-    let mut a = A(6);

-    a >>= B(4);

-    assert_eq!(A(6 >> 4), a);

-}