- Added VOICE_QUALITY ratings for all engines (naturalness/calmness)
- Azure SSML now uses mstts:express-as style="calm" for human-like delivery
- Added --list-engines with quality rankings
- Added --quality-check for A/B sample comparison
- Updated README with quality-first guidance
- Warns against Piper for production (robotic-ish)
- Recommends Azure AriaNeural or ElevenLabs Rachel