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_usage_attach_seam.py

@@ -22,9 +22,9 @@ from unittest.mock import AsyncMock, patch
 
 import pytest
 
-from scribe.services.note_usage import attach_usage, empty_usage
+from grimoire.services.note_usage import attach_usage, empty_usage
 
-ROOT = pathlib.Path(__file__).resolve().parents[1] / "src" / "scribe"
+ROOT = pathlib.Path(__file__).resolve().parents[1] / "src" / "grimoire"
 
 # The aggregate the seam is built around. Calling it from a door is the shape
 # this file exists to prevent — not because the call is wrong, but because
@@ -41,7 +41,7 @@ def _counts(surfaced: int = 5, pulled: int = 0) -> dict:
 
 def _aggregate_returns(mapping: dict[int, dict]) -> AsyncMock:
     return patch(
-        "scribe.services.note_usage.usage_for_notes",
+        "grimoire.services.note_usage.usage_for_notes",
         AsyncMock(return_value=mapping),
     )
 
@@ -66,7 +66,7 @@ async def test_one_aggregate_for_the_whole_page() -> None:
     review, because the per-row version reads more naturally."""
     rows = [{"id": n} for n in range(25)]
     mock = AsyncMock(return_value={})
-    with patch("scribe.services.note_usage.usage_for_notes", mock):
+    with patch("grimoire.services.note_usage.usage_for_notes", mock):
         await attach_usage(rows)
     assert mock.await_count == 1, "usage must be read once per page, not per row"
     assert sorted(mock.await_args.args[0]) == list(range(25))
@@ -119,7 +119,7 @@ async def test_the_key_can_be_named(key: str) -> None:
 
 async def test_an_empty_page_asks_nothing_and_breaks_nothing() -> None:
     mock = AsyncMock(return_value={})
-    with patch("scribe.services.note_usage.usage_for_notes", mock):
+    with patch("grimoire.services.note_usage.usage_for_notes", mock):
         await attach_usage([])
     assert mock.await_args.args[0] == []