- Register all missing migrations in runner.py
- Make v4.3 idempotent (rename xml_unsigned only if exists)
- Make v3.3 idempotent (skip warehouse_inventory/purchase_order_items ops when tables/columns missing)
- Mark v3.3.1 and v3.9 as master-only (SKIP)
- Mark v3.5.1 as optional (skip if whatsapp tables missing)
- Runner skips files marked with '-- : SKIP'
- Add MercadoLibre OAuth, listings, orders, webhooks and category search
- New marketplace_external_bp.py, meli_service.py, marketplace_external_service.py
- New marketplace_external.html/js with ML management UI
- Inventory: bulk publish to ML with category autocomplete, listing type and shipping selectors
- Inventory: new .btn--meli styles, select/label CSS fixes
- WhatsApp bridge: rate limiting, 440/515/408 error handling, stale watchdog
- DB migration v3.4_meli_integration.sql for marketplace_listings, orders, sync_queue
- Add Celery tasks for ML sync and webhook processing
- Sidebar: MercadoLibre navigation link
