Temporary instrumentation to diagnose why InventoryWindow doesn't refresh
on inventory_delta. Three log points:
- useLiveData: logs when inventory_delta arrives and version bump
- InventoryWindow effect: logs every run with state
- InventoryWindow fetch: logs when debounce fires and result count
Also added cache-buster (_t=timestamp) to the refetch URL in case HTTP
caching is masking fresh data.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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