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, 22 deletions

diff --git a/vendor/hyper/src/client/conn/mod.rs b/vendor/hyper/src/client/conn/mod.rs
deleted file mode 100644
index f982ae6d..00000000
--- a/vendor/hyper/src/client/conn/mod.rs
+++ /dev/null
@@ -1,22 +0,0 @@
-//! Lower-level client connection API.
-//!
-//! The types in this module are to provide a lower-level API based around a
-//! single connection. Connecting to a host, pooling connections, and the like
-//! are not handled at this level. This module provides the building blocks to
-//! customize those things externally.
-//!
-//! If you are looking for a convenient HTTP client, then you may wish to
-//! consider [reqwest](https://github.com/seanmonstar/reqwest) for a high level
-//! client or [`hyper-util`'s client](https://docs.rs/hyper-util/latest/hyper_util/client/index.html)
-//! if you want to keep it more low level / basic.
-//!
-//! ## Example
-//!
-//! See the [client guide](https://hyper.rs/guides/1/client/basic/).
-
-#[cfg(feature = "http1")]
-pub mod http1;
-#[cfg(feature = "http2")]
-pub mod http2;
-
-pub use super::dispatch::TrySendError;