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_tz_helpers.py

@@ -9,7 +9,7 @@ import pytest
 
 @pytest.mark.asyncio
 async def test_get_user_tz_returns_configured_zone():
-    from scribe.services import tz as tz_mod
+    from grimoire.services import tz as tz_mod
 
     with patch.object(tz_mod, "get_setting", AsyncMock(return_value="America/New_York")):
         zone = await tz_mod.get_user_tz(1)
@@ -18,7 +18,7 @@ async def test_get_user_tz_returns_configured_zone():
 
 @pytest.mark.asyncio
 async def test_get_user_tz_falls_back_to_utc_on_bad_input():
-    from scribe.services import tz as tz_mod
+    from grimoire.services import tz as tz_mod
 
     with patch.object(tz_mod, "get_setting", AsyncMock(return_value="Not/AZone")):
         zone = await tz_mod.get_user_tz(1)
@@ -28,7 +28,7 @@ async def test_get_user_tz_falls_back_to_utc_on_bad_input():
 @pytest.mark.asyncio
 async def test_user_day_date_before_4am_returns_yesterday():
     """00:00–03:59 local still shows yesterday's day_date."""
-    from scribe.services import tz as tz_mod
+    from grimoire.services import tz as tz_mod
 
     ny = ZoneInfo("America/New_York")
     # 02:00 NY on 2026-04-13 → day_date = 2026-04-12 (still pre-rollover)
@@ -47,7 +47,7 @@ async def test_user_day_date_before_4am_returns_yesterday():
 
 @pytest.mark.asyncio
 async def test_user_day_date_after_4am_returns_today():
-    from scribe.services import tz as tz_mod
+    from grimoire.services import tz as tz_mod
 
     ny = ZoneInfo("America/New_York")
     fake_now = datetime(2026, 4, 13, 4, 30, tzinfo=ny)