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>

docker-compose.prod.yml

@@ -1,6 +1,6 @@
 services:
   app:
-    image: git.fabledsword.com/bvandeusen/fabledassistant:latest
+    image: git.fabledsword.com/bvandeusen/fabledscribe:latest
     environment:
       DATABASE_URL: "postgresql+asyncpg://fabled:${DB_PASSWORD}@db:5432/fabledassistant"
       SECRET_KEY: "${SECRET_KEY}"