- Add latency metrics to summarizeText and textToSpeech functions
- Add /tts_status command showing config and last attempt result
- Add /tts_summary command for feature flag control
- Fix atomic write to clean up temp file on rename failure
- Add timer.unref() to prevent blocking process shutdown
- Add unit tests for validation functions (13 tests)
- Update README with new commands and features
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
