## Summary
- Replaces 18 TeslaMate dashboard ConfigMaps (713 KB / 22,080 lines) with a Grafana init container
- Init container fetches dashboard JSON directly from `mirrors/teslamate` on forge, pinned to `v3.0.0`
- Grafana's file provider picks them up from `/tmp/dashboards/TeslaMate/` via `foldersFromFilesStructure`
- Non-TeslaMate dashboards remain as ConfigMaps (unchanged)
## How it works
- New `init-teslamate-dashboards` init container uses busybox `wget` to fetch each JSON file from `https://forge.eblu.me/mirrors/teslamate/raw/tag/v3.0.0/grafana/dashboards/`
- Files land in `/tmp/dashboards/TeslaMate/`, same emptyDir volume the sidecar uses
- The sidecar continues to handle ConfigMap-based dashboards; the init container handles TeslaMate
- Version pin is in the init container args (TESLAMATE_VERSION)
## Deployment and Testing
- [ ] Sync `grafana` app from branch — verify init container runs and fetches dashboards
- [ ] Sync `grafana-config` app from branch — verify TeslaMate ConfigMaps are pruned
- [ ] Check Grafana UI: TeslaMate folder should still contain all 18 dashboards
- [ ] Verify non-TeslaMate dashboards are unaffected
- [ ] After merge: sync both apps from main
Reviewed-on: #296