[codex] Add clinic phone assistant

[Bobehska21]

What changed

• Added a Czech Twilio clinic phone assistant with appointment intake, speech confidence handling, phone-number capture, whole-call recording metadata, and VS Code-readable exports.
• Added a local Czech voice assistant client that persists appointment requests to SQLite and JSON/CSV exports.
• Hardened WhisperFlow WebSocket session cleanup and made the transcription language configurable.
• Added development/test robustness for local Python setup and missing audio input devices.
• Ignored local clinic runtime data and locally downloaded Whisper model files.

Why

The clinic workflow needs a caller-friendly intake flow that stores the patient phone number, transcript confidence, and recording metadata so staff can verify unclear calls.

Validation

• python -m black --check twilio_clinic_assistant.py voice_assistant.py whisperflow tests
• python -m compileall twilio_clinic_assistant.py voice_assistant.py whisperflow tests
• pytest -q --ignore=tests/benchmark

Notes

Runtime database/export files and large downloaded model files are intentionally excluded from the commit.

[dimastatz]

Thanks for contribution. Could you please record a short video for demo using this code with whisper-flow?