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, 46 deletions

diff --git a/tests/authorization/server_test.rs b/tests/authorization/server_test.rs
deleted file mode 100644
index 5a92dcff..00000000
--- a/tests/authorization/server_test.rs
+++ /dev/null
@@ -1,46 +0,0 @@
-#[cfg(test)]
-mod tests {
-    use crate::support::factory_bot::*;
-    use std::net::SocketAddr;
-    use tokio::net::TcpListener;
-
-    async fn available_port() -> SocketAddr {
-        let listener = TcpListener::bind("127.0.0.1:0")
-            .await
-            .expect("Failed to bind to random port");
-        let addr = listener.local_addr().expect("Failed to get local address");
-        drop(listener);
-        addr
-    }
-
-    async fn start_server() -> (SocketAddr, tokio::task::JoinHandle<()>) {
-        let addr = available_port().await;
-        let server = authzd::authorization::Server::default();
-
-        let handle = tokio::spawn(async move {
-            server.serve(addr).await.expect("Failed to start server");
-        });
-
-        tokio::time::sleep(tokio::time::Duration::from_millis(100)).await;
-
-        (addr, handle)
-    }
-
-    #[tokio::test]
-    async fn test_health_ext_authz_service() {
-        let (addr, server) = start_server().await;
-
-        let mut client = build_rpc_client(
-            addr,
-            envoy_types::pb::envoy::service::auth::v3::authorization_client::AuthorizationClient::new,
-        )
-        .await;
-
-        let request = tonic::Request::new(envoy_types::ext_authz::v3::pb::CheckRequest::default());
-        let response = client.check(request).await;
-
-        assert!(response.is_ok());
-
-        server.abort();
-    }
-}