Fix services-check and update docs for Frigate migration to ringtail (#218)

## Summary
- Move mosquitto, ntfy, frigate, frigate-notify pod checks from `minikube-indri` to `k3s-ringtail` context in `services-check`
- Add `nvidia-device-plugin` pod check for ringtail k3s
- Rename "Kubernetes pods" section to "Indri minikube pods" for clarity
- Update 8 documentation files to reflect the migration completed in PRs #216/#217

## Files Changed
| File | Change |
|------|--------|
| `mise-tasks/services-check` | Move 4 pod checks to k3s-ringtail, add nvidia-device-plugin |
| `docs/reference/services/frigate.md` | Image→tensorrt, detector→ONNX/CUDA, shm→512Mi |
| `docs/reference/infrastructure/ringtail.md` | List actual k3s workloads |
| `docs/reference/infrastructure/indri.md` | Note frigate migration |
| `docs/explanation/architecture.md` | Add ringtail to diagram + compute layer |
| `docs/reference/kubernetes/cluster.md` | Note two clusters, add k3s section |
| `docs/reference/reference.md` | Update frigate/ntfy location |
| `docs/how-to/plans/completed/operationalize-reolink-camera.md` | Add post-completion migration note |
| `CLAUDE.md` | Add k3s-ringtail context guidance |

## Test plan
- [ ] `mise run services-check` — all checks pass
- [ ] Review each doc for accuracy against deployed state

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/218

docs/reference/reference.md

@@ -1,6 +1,6 @@
 ---
 title: Reference
-modified: 2026-02-17
+modified: 2026-02-19
 tags:
   - reference
 ---
@@ -21,7 +21,7 @@ Individual service reference cards with URLs and configuration details.
 | [[caddy]] | Reverse proxy & TLS termination | indri |
 | [[1password]] | Secrets management | cloud + k8s |
 | [[forgejo]] | Git forge & CI/CD | indri |
-| [[frigate]] | Network video recorder | k8s |
+| [[frigate]] | Network video recorder | k8s (ringtail) |
 | [[grafana]] | Dashboards & visualization | k8s |
 | [[immich]] | Photo management | k8s |
 | [[jellyfin]] | Media server | indri |
@@ -29,7 +29,7 @@ Individual service reference cards with URLs and configuration details.
 | [[loki]] | Log aggregation | k8s |
 | [[miniflux]] | RSS feed reader | k8s |
 | [[navidrome]] | Music streaming | k8s |
-| [[ntfy]] | Push notifications | k8s |
+| [[ntfy]] | Push notifications | k8s (ringtail) |
 | [[postgresql]] | Database cluster | k8s |
 | [[prometheus]] | Metrics collection | k8s |
 | [[teslamate]] | Tesla data logger | k8s |