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, 14 deletions

diff --git a/vendor/hyper/src/common/mod.rs b/vendor/hyper/src/common/mod.rs
deleted file mode 100644
index a0c71385..00000000
--- a/vendor/hyper/src/common/mod.rs
+++ /dev/null
@@ -1,14 +0,0 @@
-#[cfg(all(any(feature = "client", feature = "server"), feature = "http1"))]
-pub(crate) mod buf;
-#[cfg(all(feature = "server", any(feature = "http1", feature = "http2")))]
-pub(crate) mod date;
-pub(crate) mod io;
-#[cfg(all(any(feature = "client", feature = "server"), feature = "http1"))]
-pub(crate) mod task;
-#[cfg(any(
-    all(feature = "server", feature = "http1"),
-    all(any(feature = "client", feature = "server"), feature = "http2"),
-))]
-pub(crate) mod time;
-#[cfg(all(any(feature = "client", feature = "server"), feature = "http1"))]
-pub(crate) mod watch;