chore(dead-code): fix prod image, drop orphaned code, correct delete_rule doc

Drift-audit Group 7 (renamed/removed lingers) + Group 5 #9:

- docker-compose.prod.yml pulled fabledassistant:latest, a tag CI stopped
  publishing after the rename. Point it at fabledscribe:latest (the name CI
  and quickstart use). The internal DB name stays fabledassistant by design.
- Remove the unused hard-delete delete_note imports from the notes and tasks
  route modules (they delete via trash; the import was an attractive nuisance
  that bypassed soft-delete).
- delete_rule MCP tool: docstring/warning said 'permanently delete' but the
  body moves the rule to recoverable trash. Corrected to match.
- Delete services/calendar_sync.py: fully orphaned (zero importers) and it
  read Config attrs that no longer exist, so any re-wiring would crash.
- Remove dead services: notes.search_notes_for_context and logging.log_generation
  (zero callers; log_generation wrote a 'generation' category no stats/UI surface).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/fabledassistant/services/notes.py

@@ -409,37 +409,6 @@ async def convert_task_to_note(user_id: int, note_id: int) -> Note:
         return note
 
 
-async def search_notes_for_context(
-    user_id: int,
-    keywords: list[str],
-    exclude_ids: set[int] | None = None,
-    limit: int = 3,
-    project_id: int | None = None,
-    orphan_only: bool = False,
-) -> list[Note]:
-    """Search notes by keywords with OR logic. Optimized for context building — no count query."""
-    async with async_session() as session:
-        keyword_filters = []
-        for kw in keywords:
-            escaped = kw.replace("\\", "\\\\").replace("%", "\\%").replace("_", "\\_")
-            pattern = f"%{escaped}%"
-            keyword_filters.append(or_(Note.title.ilike(pattern), Note.body.ilike(pattern)))
-
-        query = select(Note).where(
-            Note.user_id == user_id, or_(*keyword_filters), Note.deleted_at.is_(None)
-        )
-        if orphan_only:
-            query = query.where(Note.project_id.is_(None))
-        elif project_id is not None:
-            query = query.where(Note.project_id == project_id)
-        if exclude_ids:
-            query = query.where(Note.id.notin_(exclude_ids))
-        query = query.order_by(Note.updated_at.desc()).limit(limit)
-
-        result = await session.execute(query)
-        return list(result.scalars().all())
-
-
 async def get_notes_by_ids(user_id: int, note_ids: list[int]) -> dict[int, Note]:
     """Batch fetch notes by ID list. Returns {note_id: Note}."""
     if not note_ids: