Attribute Devii AI spend to its invoking action, fix quiz question-at-a-time review, DB API/isslop result routes, workspace docs, and drop redundant docstrings

- Route Devii-driven AI gateway cost to the action/tool that triggered
  it instead of a blanket "internal" bucket, so per-feature AI spend
  is attributable.
- Fix the quiz attempt review to show one previously-answered question
  at a time instead of all of them at once, and stop a quiz endpoint
  linked from the quiz flow from responding with raw JSON.
- Add DB API async query result route and AI Usage Analyzer annotated
  source/media routes, with traversal-safe uid/path handling and
  matching tests.
- Add Code Farm action audit logging (plant/harvest/buy-plot/upgrade/
  fertilize) and related admin workspace/services/trash/gateway route
  and doc touch-ups.
- Drop redundant docstrings from access_tokens.py per the no-comments
  convention.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VL9Xn57W5UR3HZbbuuzxdK

devplacepy/services/containers/api.py

@@ -179,9 +179,6 @@ def parse_env(value) -> dict:
     return env
 
 
-# ---------------- instances ----------------
-
-
 def validate_ingress(slug: str, port, port_list) -> tuple:
     slug = (slug or "").strip().lower()
     if not slug:
@@ -656,9 +653,6 @@ def add_schedule(instance: dict, action: str, schedule: Schedule) -> dict:
     return store.create_schedule(instance, action, schedule.columns(), to_iso(first))
 
 
-# ---------------- aggregation ----------------
-
-
 def _percentile(values: list, pct: float) -> float:
     if not values:
         return 0.0