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, 42 deletions

diff --git a/vendor/bitflags/src/tests/extend.rs b/vendor/bitflags/src/tests/extend.rs
deleted file mode 100644
index 869dc17f..00000000
--- a/vendor/bitflags/src/tests/extend.rs
+++ /dev/null
@@ -1,42 +0,0 @@
-use super::*;
-
-#[test]
-fn cases() {
-    let mut flags = TestFlags::empty();
-
-    flags.extend(TestFlags::A);
-
-    assert_eq!(TestFlags::A, flags);
-
-    flags.extend(TestFlags::A | TestFlags::B | TestFlags::C);
-
-    assert_eq!(TestFlags::ABC, flags);
-
-    flags.extend(TestFlags::from_bits_retain(1 << 5));
-
-    assert_eq!(TestFlags::ABC | TestFlags::from_bits_retain(1 << 5), flags);
-}
-
-mod external {
-    use super::*;
-
-    #[test]
-    fn cases() {
-        let mut flags = TestExternal::empty();
-
-        flags.extend(TestExternal::A);
-
-        assert_eq!(TestExternal::A, flags);
-
-        flags.extend(TestExternal::A | TestExternal::B | TestExternal::C);
-
-        assert_eq!(TestExternal::ABC, flags);
-
-        flags.extend(TestExternal::from_bits_retain(1 << 5));
-
-        assert_eq!(
-            TestExternal::ABC | TestExternal::from_bits_retain(1 << 5),
-            flags
-        );
-    }
-}