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_rule_moment_judgments.py

@@ -12,9 +12,9 @@ from datetime import datetime, timedelta, timezone
 from pathlib import Path
 from types import SimpleNamespace
 
-from scribe.models.rule_moment_judgment import JUDGMENT_STATES, NO_MOMENT, SOURCES
-from scribe.services import moments as moments_svc
-from scribe.services import rule_moment_judgments as svc
+from grimoire.models.rule_moment_judgment import JUDGMENT_STATES, NO_MOMENT, SOURCES
+from grimoire.services import moments as moments_svc
+from grimoire.services import rule_moment_judgments as svc
 
 ROOT = Path(__file__).resolve().parents[1]
 
@@ -96,7 +96,7 @@ def test_the_unmount_line_offers_both_fixes():
 
 
 def test_a_held_reply_names_the_misfire_call_only_for_a_mount():
-    from scribe.services.moment_delivery import reply_hold_reason
+    from grimoire.services.moment_delivery import reply_hold_reason
 
     mounted = {"rule_id": 11, "title": "Definition of done", "moment": "reply.report", "trigger": ""}
     scored = {"rule_id": 12, "title": "Other", "moment": "", "score": 0.81, "trigger": ""}