Log filtering cleanup and observability improvements (#45)

## Summary
- Suppress noisy storage-provisioner Endpoints deprecation warning (upstream minikube issue)
- Disable thermal collector on indri Alloy (not supported on macOS M1)
- Add macOS power/thermal metrics collection via powermetrics LaunchDaemon
- Add Power & Thermal section to macOS Grafana dashboard
- Add logfmt parser for k8s log level extraction (Loki, Prometheus, etc.)
- Extract more fields from JSON logs (zot compatibility - uses "message" not "msg")
- Silence logfmt parse errors for non-logfmt logs
- Fix JSON escaping in devpi dashboard

## Deployment and Testing
- [x] Deployed Alloy config changes to indri via ansible
- [x] Synced alloy-k8s and grafana-config via ArgoCD
- [x] Verified power metrics appearing in Prometheus
- [x] Verified thermal collector errors stopped
- [x] Verified logfmt parse errors silenced
- [x] Verified devpi dashboard loads correctly

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

Reviewed-on: https://forge.tail8d86e.ts.net/eblume/blumeops/pulls/45

ansible/roles/alloy/templates/config.alloy.j2

@@ -6,6 +6,9 @@
 
 // System metrics exporter (replaces node_exporter)
 prometheus.exporter.unix "system" {
+  // Disable collectors that don't work on macOS
+  disable_collectors = ["thermal"]
+
   textfile {
     directory = "{{ alloy_textfile_dir }}"
   }