Paul Bailey e6f4e2ea32 Implement TTS service with Kokoro integration ...

- Created TTSService class with pipeline caching per language
- Implemented text segmentation to identify role markers (colon and bracket patterns)
- Implemented segment synthesis with voice assignment
- Implemented audio concatenation at 24 kHz sample rate
- Added fallback to default voice (af_bella) for unmapped roles
- Supports language codes: a, b, f, j
- Handles long text by chunking on sentence boundaries
- Added comprehensive unit tests (13 tests, all passing)

Requirements: 10.1, 10.3, 10.4, 6.2, 6.3, 6.4, 6.5, 6.6

2025-12-09 01:06:59 +00:00

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