refactor: rename package fabledassistant -> scribe (code-only)

Renames src/fabledassistant -> src/scribe and all imports, plus the
default DB name and DB user/password (fabled -> scribe) in config +
compose. 952 refs / 154 files. Reverses the old 'internal name stays
fabledassistant' convention.

Code-only: live databases are still physically named 'fabledassistant'.
Deployed environments must set POSTGRES_DB / POSTGRES_USER (or rename the
DB) since the defaults now resolve to 'scribe'. Repo (FabledScribe), git
host (fabledsword), MCP (fabled-git) and the image name (fabledscribe)
are intentionally unchanged.

ruff check src/ clean locally; CI (typecheck + pytest) is the gate.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/2026-03-29-voice-s2s-design.md

@@ -39,20 +39,20 @@
 
 ## New Backend Files
 
-### `src/fabledassistant/services/stt.py`
+### `src/scribe/services/stt.py`
 Lazy singleton `WhisperModel` loader. Public API:
 - `load_stt_model()` — called at startup via `asyncio.create_task`
 - `transcribe(audio_bytes, mime_type) -> str` — runs in `run_in_executor`; writes bytes to `NamedTemporaryFile`, returns concatenated segment text
 - `stt_available() -> bool`
 
-### `src/fabledassistant/services/tts.py`
+### `src/scribe/services/tts.py`
 Lazy singleton `KPipeline` loader. Public API:
 - `load_tts_model()` — called at startup
 - `synthesise(text, voice, speed) -> bytes` — runs in `run_in_executor`; returns WAV bytes (24kHz, 16-bit mono)
 - `list_voices() -> list[dict]` — returns static list of known Kokoro voice IDs + labels
 - `tts_available() -> bool`
 
-### `src/fabledassistant/routes/voice.py`
+### `src/scribe/routes/voice.py`
 Blueprint at `/api/voice`, all routes `@login_required`.
 
 | Endpoint | Method | Description |
@@ -66,27 +66,27 @@ Blueprint at `/api/voice`, all routes `@login_required`.
 
 ## Modified Backend Files
 
-### `src/fabledassistant/app.py`
+### `src/scribe/app.py`
 - Register `voice_bp` blueprint
 - In `startup()`: `asyncio.create_task(load_stt_model())` + `asyncio.create_task(load_tts_model())` when `VOICE_ENABLED`
 
-### `src/fabledassistant/config.py`
+### `src/scribe/config.py`
 - Add 4 new env var attributes
 - Add validation in `validate()`
 
-### `src/fabledassistant/services/llm.py`
+### `src/scribe/services/llm.py`
 - Add `voice_mode: bool = False` and `voice_speech_style: str = "conversational"` to `build_context()`
 - When `voice_mode=True`, prepend: *"Respond naturally as if speaking aloud. No markdown, bullet points, headers, or code blocks. Complete sentences only."*
 - Append style modifier based on `voice_speech_style`
 
-### `src/fabledassistant/services/generation_task.py`
+### `src/scribe/services/generation_task.py`
 - Add `voice_mode: bool = False` to `run_generation()`
 - Read `voice_speech_style` from settings when voice_mode; pass both to `build_context()`
 
-### `src/fabledassistant/routes/chat.py`
+### `src/scribe/routes/chat.py`
 - Allow `"voice"` in `conversation_type` whitelist
 
-### `src/fabledassistant/services/chat.py`
+### `src/scribe/services/chat.py`
 - Exclude `conversation_type == "voice"` from auto-cleanup retention
 
 ---