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_inception.py

@@ -6,8 +6,8 @@ validation is pinned here; the effects are the integration tests.
 Rules are not an inception choice: a rule in a rulebook is global, so there is
 nothing to choose.
 """
-from scribe.models.project import Project
-from scribe.services.inception import (
+from grimoire.models.project import Project
+from grimoire.services.inception import (
     CHOICE_KEYS, INCEPTION_VIAS, is_decided, normalize_choices, validate_inception,
 )
 
@@ -76,7 +76,7 @@ def test_standard_systems_vocabulary_reads_the_catalog_not_a_constant():
     read the table, or the list they show and the list they mint diverge."""
     import inspect
 
-    from scribe.services import systems as systems_svc
+    from grimoire.services import systems as systems_svc
 
     assert not hasattr(systems_svc, "STANDARD_SYSTEMS"), (
         "the constant is gone — the catalog table is the single source"