feat: add stale-repos and pending-releases audit tasks Completes the Tier 2 org visibility tasks from the plan. stale-repos Lists all non-archived repos whose last push pre-dates a configurable cutoff (MONTHS=12 default). Sorted by push date ascending (stalest first) and age-coloured: red >2 years, yellow >1 year, normal otherwise. Outputs the last-push date and age in months so it's easy to triage archiving candidates. FILTER= narrows by repo name. pending-releases Finds open PRs labelled "autorelease: pending" across the entire org via gh search — fast, single query. Shows repo, PR number, age, and title in an age-coloured table (red >14d, yellow >3d, green <3d). Designed as the table-view companion to list-release-prs (which opens browser tabs). FILTER= narrows by repo name. Footer links to force-merge-prs and list-release-prs for next steps. Also adds both tasks to the file header reference comment. https://claude.ai/code/session_01SFKChTX8gNGNmh4in5Fj8W #141