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_routes_systems.py

@@ -4,19 +4,19 @@ import inspect
 
 
 def test_systems_blueprint_registered():
-    from scribe.routes.systems import systems_bp
+    from grimoire.routes.systems import systems_bp
     assert systems_bp.name == "systems"
     assert systems_bp.url_prefix == "/api/projects"
 
 
 def test_systems_blueprint_registered_in_app():
-    from scribe.app import create_app
+    from grimoire.app import create_app
     app = create_app()
     assert "systems" in app.blueprints
 
 
 def test_system_handlers_callable():
-    from scribe.routes import systems as routes
+    from grimoire.routes import systems as routes
     for name in (
         "list_systems_route", "create_system_route", "get_system_route",
         "update_system_route", "delete_system_route", "system_records_route",
@@ -27,7 +27,7 @@ def test_system_handlers_callable():
 
 def test_service_functions_take_user_id():
     """Routes must call systems services with user_id — verify the contract."""
-    from scribe.services import systems as svc
+    from grimoire.services import systems as svc
     for fn_name in (
         "create_system", "list_systems", "get_system", "update_system",
         "delete_system", "list_records_for_system", "list_issues",