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, 72 deletions

diff --git a/vendor/overload/tests/binary.rs b/vendor/overload/tests/binary.rs
deleted file mode 100644
index 2fb209ad..00000000
--- a/vendor/overload/tests/binary.rs
+++ /dev/null
@@ -1,72 +0,0 @@
-extern crate overload;

-use overload::overload;

-use std::ops;

-

-#[derive(PartialEq, Debug)]

-struct A(i32);

-

-#[derive(PartialEq, Debug)]

-struct B(i32);

-

-#[derive(PartialEq, Debug)]

-struct C(i32);

-

-overload!((a: A) + (b: B) -> C { C(a.0 + b.0) });

-#[test]

-fn add() {

-    assert_eq!(A(3) + B(4), C(3 + 4));

-}

-

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

-#[test]

-fn sub() {

-    assert_eq!(A(3) - B(4), C(3 - 4));

-}

-

-overload!((a: A) * (b: B) -> C { C(a.0 * b.0) });

-#[test]

-fn mul() {

-    assert_eq!(A(3) * B(4), C(3 * 4));

-}

-

-overload!((a: A) / (b: B) -> C { C(a.0 / b.0) });

-#[test]

-fn div() {

-    assert_eq!(A(6) / B(3), C(6 / 3));

-}

-

-overload!((a: A) % (b: B) -> C { C(a.0 % b.0) });

-#[test]

-fn rem() {

-    assert_eq!(A(6) % B(4), C(6 % 4));

-}

-

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

-#[test]

-fn bitand() {

-    assert_eq!(A(6) & B(4), C(6 & 4));

-}

-

-overload!((a: A) | (b: B) -> C { C(a.0 | b.0) });

-#[test]

-fn bitor() {

-    assert_eq!(A(6) | B(4), C(6 | 4));

-}

-

-overload!((a: A) ^ (b: B) -> C { C(a.0 ^ b.0) });

-#[test]

-fn bitxor() {

-    assert_eq!(A(6) ^ B(4), C(6 ^ 4));

-}

-

-overload!((a: A) << (b: B) -> C { C(a.0 << b.0) });

-#[test]

-fn shl() {

-    assert_eq!(A(6) << B(4), C(6 << 4));

-}

-

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

-#[test]

-fn shr() {

-    assert_eq!(A(6) >> B(4), C(6 >> 4));

-}