Beyond basic upgrade support (#33), add WebSocket-aware filter capabilities: per-frame inspection, message-level hooks, ping/pong handling, and close frame propagation. Enables WebSocket-level guardrails, logging, and rate limiting.
Beyond basic upgrade support (#33), add WebSocket-aware filter capabilities: per-frame inspection, message-level hooks, ping/pong handling, and close frame propagation. Enables WebSocket-level guardrails, logging, and rate limiting.