- Implement http.Hijacker on responseRecorder to enable WebSocket upgrade
(delegates Hijack() to underlying ResponseWriter, marks hijacked state)
- After WebSocket upgrade (101 Switching Protocols), skip HTTP response-phase
WAF checks since connection becomes a binary frame stream
- Log WebSocket upgrades at Info level for observability
- Fix P2-3: use r.Proto instead of hardcoded "HTTP/1.1" in ProcessResponseHeaders
for correct HTTP/2 protocol version reporting
- Add Write() method to responseRecorder to ensure WriteHeader is called
before first Write (complies with http.ResponseWriter contract)
- Add bufio/net imports required by Hijacker interface
- Update README with WebSocket support section and v1.2 changelog
- Update SECURITY_AUDIT to mark P2-3 and P2-4 as fixed