- Create stock_status_history table to track status changes over time
- Add stockStatusHistoryQueries with getByProductId, recordChange, getStats
- Update scheduler to record status changes
- Update product creation and manual refresh to record initial/changed status
- Add GET /products/:id/stock-history API endpoint
- Create StockTimeline component with:
- Visual timeline bar showing in-stock (green) vs out-of-stock (red)
- Availability percentage
- Outage count and duration stats
- Integrate timeline into ProductDetail page
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
