Alex 05034acd27 Add anonymous speaker tracking (online diarization) ...

Unrecognized speakers now get stable IDs like "unknown_a7f3" instead
of None. Uses online clustering of Resemblyzer embeddings:
- Matches against tracked anonymous speakers (cosine > 0.70)
- Updates running average embedding on re-identification
- Creates new ID from SHA-256 hash of quantized embedding
- Expires after 1 hour of silence, max 10 tracked simultaneously

New API: POST /speakers/promote?anon_id=unknown_a7f3&name=Alex
Promotes an anonymous speaker to enrolled using their averaged embedding.

Flow: unknown person speaks → "unknown_a7f3" → you ask "who's that?" →
promote to "Bob" → now recognized by name going forward.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-04-12 21:58:30 -05:00

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