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>

tests/test_tz_helpers.py

@@ -9,7 +9,7 @@ import pytest
 
 @pytest.mark.asyncio
 async def test_get_user_tz_returns_configured_zone():
-    from fabledassistant.services import tz as tz_mod
+    from scribe.services import tz as tz_mod
 
     with patch.object(tz_mod, "get_setting", AsyncMock(return_value="America/New_York")):
         zone = await tz_mod.get_user_tz(1)
@@ -18,7 +18,7 @@ async def test_get_user_tz_returns_configured_zone():
 
 @pytest.mark.asyncio
 async def test_get_user_tz_falls_back_to_utc_on_bad_input():
-    from fabledassistant.services import tz as tz_mod
+    from scribe.services import tz as tz_mod
 
     with patch.object(tz_mod, "get_setting", AsyncMock(return_value="Not/AZone")):
         zone = await tz_mod.get_user_tz(1)
@@ -28,7 +28,7 @@ async def test_get_user_tz_falls_back_to_utc_on_bad_input():
 @pytest.mark.asyncio
 async def test_user_day_date_before_4am_returns_yesterday():
     """00:00–03:59 local still shows yesterday's day_date."""
-    from fabledassistant.services import tz as tz_mod
+    from scribe.services import tz as tz_mod
 
     ny = ZoneInfo("America/New_York")
     # 02:00 NY on 2026-04-13 → day_date = 2026-04-12 (still pre-rollover)
@@ -47,7 +47,7 @@ async def test_user_day_date_before_4am_returns_yesterday():
 
 @pytest.mark.asyncio
 async def test_user_day_date_after_4am_returns_today():
-    from fabledassistant.services import tz as tz_mod
+    from scribe.services import tz as tz_mod
 
     ny = ZoneInfo("America/New_York")
     fake_now = datetime(2026, 4, 13, 4, 30, tzinfo=ny)