rename(547): the server is grimoire — package, image, DB defaults, backups

Step 2 of the Scribe -> Grimoire rename.

- src/scribe -> src/grimoire, and every import, patch target, module path,
  hypercorn entry point and `python -m grimoire.restore` with it; pyproject,
  uv.lock and the frontend package are named grimoire.
- Image git.fabledsword.com/bvandeusen/fabledgrimoire; CI's Postgres service
  runs as grimoire / grimoire_test.
- Compose files default the DB user, database and (prod) volume to grimoire,
  each overridable from .env, so an install created as Scribe keeps its data
  by setting POSTGRES_USER, POSTGRES_DB and PGDATA_VOLUME.
- Backups are written as grimoire-<ts>.tar with format grimoire-backup-tar.
  Archives named scribe-* with the scribe-backup-tar manifest still restore
  and are still counted at the destination (folder and S3), with tests.
- Exports, the MCP auth realm, the ASGI scope key and the persistent logger
  carry the new name.

Kept on purpose: the secret-sealing key label stays "scribe.secrets.v1",
because every stored secret was derived under it.

Plugin identity (plugin name, hooks, env vars, .scribe marker, skills) is
step 3.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_integration_snippet_locations.py

@@ -19,11 +19,11 @@ import pytest
 import pytest_asyncio
 from sqlalchemy import delete, func, select
 
-from scribe.models import async_session
-from scribe.models.note import Note
-from scribe.models.user import User
-from scribe.services.knowledge import location_matches, location_parts
-from scribe.services.snippets import (
+from grimoire.models import async_session
+from grimoire.models.note import Note
+from grimoire.models.user import User
+from grimoire.services.knowledge import location_matches, location_parts
+from grimoire.services.snippets import (
     SNIPPET_NOTE_TYPE,
     backfill_snippet_data,
     compose_body,
@@ -152,7 +152,7 @@ async def test_keyword_arm_applies_the_location_filter(seeded):
     keyword (ILIKE) arm, which is the second place the SQL clause has to appear."""
     user_id, ids = seeded
     with patch(
-        "scribe.services.embeddings.semantic_search_notes",
+        "grimoire.services.embeddings.semantic_search_notes",
         AsyncMock(return_value=[]),
     ):
         assert await _ids_for(user_id, q="nested", repo="Grimoire") == {ids["nested"]}
@@ -180,7 +180,7 @@ async def test_semantic_arm_applies_the_location_filter(seeded):
     candidates = [(0.9, n) for n in rows]
 
     with patch(
-        "scribe.services.embeddings.semantic_search_notes",
+        "grimoire.services.embeddings.semantic_search_notes",
         AsyncMock(return_value=candidates),
     ):
         # No keyword can match this, so every hit below came from the stub.