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_notes_description_field.py

@@ -34,10 +34,10 @@ async def test_update_note_persists_description():
     mock_note.project_id = None
 
     with patch(
-        "fabledassistant.services.notes.async_session",
+        "scribe.services.notes.async_session",
         return_value=_mock_session_for_update(mock_note),
     ):
-        from fabledassistant.services.notes import update_note
+        from scribe.services.notes import update_note
         await update_note(1, 1, description="the goal text")
 
     assert mock_note.description == "the goal text"
@@ -64,9 +64,9 @@ async def test_create_note_forwards_description_to_model():
     mock_session.__aexit__ = AsyncMock(return_value=False)
 
     with patch(
-        "fabledassistant.services.notes.async_session", return_value=mock_session
-    ), patch("fabledassistant.services.notes.Note", FakeNote):
-        from fabledassistant.services.notes import create_note
+        "scribe.services.notes.async_session", return_value=mock_session
+    ), patch("scribe.services.notes.Note", FakeNote):
+        from scribe.services.notes import create_note
         await create_note(
             user_id=1, title="renew cert", description="the goal text",
         )