Tier 1 version bumps (#186)

## Summary

Audit and upgrade of all deployed images, helm charts, and custom container Dockerfiles to latest stable versions. This PR covers Tier 1 (low-risk minor/patch bumps only).

### Upstream images
| Image | Old | New |
|-------|-----|-----|
| kube-state-metrics | v2.13.0 | v2.18.0 |
| prometheus | v3.2.1 | v3.9.1 |
| loki | 3.3.2 | 3.6.5 |
| alloy | v1.5.1 | v1.13.1 |
| tailscale (proxy + operator) | v1.92.5 | v1.94.1 |
| navidrome | :latest | v0.60.3 (pinned) |

### Helm charts
| Chart | Old | New |
|-------|-----|-----|
| CloudNativePG | v0.27.0 | v0.27.1 |
| 1Password Connect | 2.2.1 | 2.3.0 |

### Custom containers (Dockerfiles updated, images not yet tagged)
| Container | Changes | New tag |
|-----------|---------|---------|
| miniflux | 2.2.16→2.2.17 (security), alpine 3.22 | v1.1.0 |
| kubectl | v1.34.1→v1.34.4, alpine 3.22 | v1.1.0 |
| kiwix-serve | alpine 3.22 | v1.1.0 |
| nettest | alpine 3.22 | v0.14.0 |
| transmission | alpine 3.22, pkg 4.0.6-r4 | v1.1.0 |

All custom containers verified with local `dagger call build`.

### Deferred to Tier 2 (separate PRs)
- Forgejo runner 6→12 (major version scheme change)
- Docker DinD 27→29
- Grafana chart 8→11 (repo migration)
- External Secrets 1→2 (breaking changes)
- Python 3.12→3.13, Elixir 1.18→1.19, Node 22→24
- Transmission 4.0.6→4.1.0 (not in Alpine yet)

## Deployment

After merge:
1. Tag custom containers: `mise run container-tag-and-release <name> <version>` for each
2. Wait for CI builds to complete
3. `argocd app sync apps` then sync individual apps, or let ArgoCD auto-detect

Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/186

argocd/apps/1password-connect.yaml

@@ -21,7 +21,7 @@ spec:
   project: default
   sources:
     - repoURL: ssh://forgejo@forge.ops.eblu.me:2222/eblume/connect-helm-charts.git
-      targetRevision: connect-2.2.1
+      targetRevision: connect-2.3.0
       path: charts/connect
       helm:
         releaseName: onepassword-connect

argocd/apps/cloudnative-pg.yaml

@@ -12,7 +12,7 @@ spec:
   sources:
     # Helm chart from forge mirror (SSH via egress)
     - repoURL: ssh://forgejo@forge.ops.eblu.me:2222/eblume/cloudnative-pg-charts.git
-      targetRevision: cloudnative-pg-v0.27.0
+      targetRevision: cloudnative-pg-v0.27.1
       path: charts/cloudnative-pg
       helm:
         releaseName: cloudnative-pg