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/hyper/src/rt/mod.rs b/vendor/hyper/src/rt/mod.rs
deleted file mode 100644
index de67c3fc..00000000
--- a/vendor/hyper/src/rt/mod.rs
+++ /dev/null
@@ -1,42 +0,0 @@
-//! Runtime components
-//!
-//! The traits and types within this module are used to allow plugging in
-//! runtime types. These include:
-//!
-//! - Executors
-//! - Timers
-//! - IO transports
-
-pub mod bounds;
-mod io;
-mod timer;
-
-pub use self::io::{Read, ReadBuf, ReadBufCursor, Write};
-pub use self::timer::{Sleep, Timer};
-
-/// An executor of futures.
-///
-/// This trait allows Hyper to abstract over async runtimes. Implement this trait for your own type.
-///
-/// # Example
-///
-/// ```
-/// # use hyper::rt::Executor;
-/// # use std::future::Future;
-/// #[derive(Clone)]
-/// struct TokioExecutor;
-///
-/// impl<F> Executor<F> for TokioExecutor
-/// where
-///     F: Future + Send + 'static,
-///     F::Output: Send + 'static,
-/// {
-///     fn execute(&self, future: F) {
-///         tokio::spawn(future);
-///     }
-/// }
-/// ```
-pub trait Executor<Fut> {
-    /// Place the future into the executor to be run.
-    fn execute(&self, fut: Fut);
-}