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, 21 deletions

diff --git a/vendor/bytes/tests/test_iter.rs b/vendor/bytes/tests/test_iter.rs
deleted file mode 100644
index bad90186..00000000
--- a/vendor/bytes/tests/test_iter.rs
+++ /dev/null
@@ -1,21 +0,0 @@
-#![warn(rust_2018_idioms)]
-
-use bytes::{buf::IntoIter, Bytes};
-
-#[test]
-fn iter_len() {
-    let buf = Bytes::from_static(b"hello world");
-    let iter = IntoIter::new(buf);
-
-    assert_eq!(iter.size_hint(), (11, Some(11)));
-    assert_eq!(iter.len(), 11);
-}
-
-#[test]
-fn empty_iter_len() {
-    let buf = Bytes::new();
-    let iter = IntoIter::new(buf);
-
-    assert_eq!(iter.size_hint(), (0, Some(0)));
-    assert_eq!(iter.len(), 0);
-}