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_supersession_ranking.py

@@ -14,7 +14,7 @@ from unittest.mock import AsyncMock, patch
 
 import pytest
 
-from scribe.services.embeddings import (
+from grimoire.services.embeddings import (
     _SUPERSESSION_PENALTY,
     _apply_supersession_penalty,
 )
@@ -23,7 +23,7 @@ from tests.helpers import fake_note
 
 def _stale(*ids):
     return patch(
-        "scribe.services.supersession.superseded_ids",
+        "grimoire.services.supersession.superseded_ids",
         AsyncMock(return_value=set(ids)),
     )
 
@@ -109,7 +109,7 @@ async def test_a_failed_lookup_returns_unpenalised_results_not_none():
     behaviour that shipped for months; returning nothing would turn a
     supersession hiccup into a broken search."""
     scored = [(0.70, fake_note(id=1)), (0.69, fake_note(id=2))]
-    with patch("scribe.services.supersession.superseded_ids",
+    with patch("grimoire.services.supersession.superseded_ids",
                AsyncMock(side_effect=RuntimeError("db gone"))):
         out = await _apply_supersession_penalty(scored, limit=5)
     assert [int(n.id) for _s, n in out] == [1, 2]
@@ -121,7 +121,7 @@ async def test_an_empty_candidate_set_short_circuits():
     """No candidates means no lookup — this runs on every ranked query, and a
     round trip to learn nothing is a round trip too many."""
     called = AsyncMock(return_value=set())
-    with patch("scribe.services.supersession.superseded_ids", called):
+    with patch("grimoire.services.supersession.superseded_ids", called):
         assert await _apply_supersession_penalty([], limit=5) == []
     called.assert_not_awaited()