The repositories page was eagerly fetching restic stats on every page load,
which causes high CPU/Memory usage for large repositories (especially multi-TB
Backblaze repos). This fix removes the eager loading from the route loader,
so stats are now fetched on-demand by the frontend component instead.
This resolves the issue where:
- Loading the repository page would trigger restic stats immediately
- Refreshing the page would trigger additional calls to restic stats
- Resource consumption would ramp up significantly
Fixes#614
3484d063c8