feat(logging, executor): add request logging tests and WebSocket-based Codex executor

- Introduced unit tests for request logging middleware to enhance coverage.
- Added WebSocket-based Codex executor to support Responses API upgrade.
- Updated middleware logic to selectively capture request bodies for memory efficiency.
- Enhanced Codex configuration handling with new WebSocket attributes.

internal/watcher/synthesizer/config.go

@@ -160,6 +160,9 @@ func (s *ConfigSynthesizer) synthesizeCodexKeys(ctx *SynthesisContext) []*coreau
 		if ck.BaseURL != "" {
 			attrs["base_url"] = ck.BaseURL
 		}
+		if ck.Websockets {
+			attrs["websockets"] = "true"
+		}
 		if hash := diff.ComputeCodexModelsHash(ck.Models); hash != "" {
 			attrs["models_hash"] = hash
 		}