feat(api, watcher): add zstd decoding for request logs and payload diff support

- Added `zstd` decoding support in request logging, including helper functions to process `Content-Encoding` headers.
- Enhanced config diff logic to compare payload-specific rules and track changes in payload configurations.
- Added tests to validate `zstd` decoding and payload diff behavior.

sdk/cliproxy/service.go

@@ -555,6 +555,9 @@ func (s *Service) applyConfigUpdate(newCfg *config.Config) {
 		s.coreManager.SetConfig(newCfg)
 		s.coreManager.SetOAuthModelAlias(newCfg.OAuthModelAlias)
 	}
+	if newCfg.Home.Enabled {
+		s.registerHomeExecutors()
+	}
 	s.rebindExecutors()
 }