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_services_backup_job.py

@@ -10,8 +10,8 @@ from unittest.mock import patch
 
 import pytest
 
-from scribe.services import backup_destination, backup_job
-from scribe.services.backup_destination import (
+from grimoire.services import backup_destination, backup_job
+from grimoire.services.backup_destination import (
     BackupConfig, Delivered, DestinationError, apply_changes,
 )
 
@@ -48,7 +48,7 @@ def _patched(settings, deliver=None, config=BackupConfig(enabled=True)):
         patch.object(backup_job, "load_config", load_config),
         patch.object(backup_job, "load_secret", load_secret),
         patch.object(backup_job, "deliver", deliver or delivered),
-        patch("scribe.services.backup.export_full_backup", export),
+        patch("grimoire.services.backup.export_full_backup", export),
     ]
 
 
@@ -211,8 +211,8 @@ def test_a_typed_mistake_is_refused_with_the_reason(data, said):
 
 
 def test_routes_and_scheduler_are_wired():
-    from scribe.app import create_app
-    from scribe.routes import admin as admin_routes
+    from grimoire.app import create_app
+    from grimoire.routes import admin as admin_routes
 
     for name in ("get_backups", "update_backups", "check_backups_destination", "run_backup_now"):
         assert callable(getattr(admin_routes, name))