scripts/triage-reviews.py was fully written but had no workflow, so it
never ran. Add a daily 07:00 UTC cron (staggered after product-intelligence)
plus workflow_dispatch, with Python 3.12 + the Android Publisher API client
deps the script imports, and GOOGLE_SERVICE_ACCOUNT_JSON / GH_TOKEN passed
through as named secrets.
Also fix a stale doc-string reference: the issue body linked to a
non-existent monitor-reviews.yml; point it at the workflow actually created.
