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_lesson_rule_links.py

@@ -13,14 +13,14 @@ import pytest_asyncio
 from sqlalchemy import delete, select
 from sqlalchemy.exc import IntegrityError
 
-from scribe.models import async_session
-from scribe.models.lesson_rule_link import LessonRuleLink
-from scribe.models.note import Note
-from scribe.models.project import Project
-from scribe.models.rulebook import Rule
-from scribe.services import lesson_rules as links_svc
-from scribe.services import lessons as lessons_svc
-from scribe.services import rulebooks as rulebooks_svc
+from grimoire.models import async_session
+from grimoire.models.lesson_rule_link import LessonRuleLink
+from grimoire.models.note import Note
+from grimoire.models.project import Project
+from grimoire.models.rulebook import Rule
+from grimoire.services import lesson_rules as links_svc
+from grimoire.services import lessons as lessons_svc
+from grimoire.services import rulebooks as rulebooks_svc
 from tests.helpers import ensure_user
 
 pytestmark = [
@@ -32,7 +32,7 @@ pytestmark = [
 @pytest.fixture(autouse=True)
 def _no_reindex():
     """Rule writes detach an embedding refresh that outlives the test's loop."""
-    with patch("scribe.services.rulebooks._refresh_rule_embedding", MagicMock()):
+    with patch("grimoire.services.rulebooks._refresh_rule_embedding", MagicMock()):
         yield
 
 
@@ -231,7 +231,7 @@ async def test_the_unjudged_list_is_scoped_to_the_reader(world):
 
 
 async def test_deleting_the_lesson_takes_its_answer_with_it(world):
-    from scribe.models.lesson_rule_link import LessonNoRule
+    from grimoire.models.lesson_rule_link import LessonNoRule
 
     await links_svc.set_no_rule(world["owner"], world["lesson"], "alone")
     async with async_session() as s: