feat: add comprehensive logging infrastructure

- Add Loki/Prometheus/Grafana stack in logging-stack/
- Add log-ingest service for receiving events from AI stacks
- Add Grafana dashboard with stack_name filtering
- Update Dokploy client with setApplicationEnv method
- Configure STACK_NAME env var for deployed stacks
- Add alerting rules for stack health monitoring

logging-stack/config/grafana/provisioning/dashboards/dashboards.yml

@@ -0,0 +1,11 @@
+apiVersion: 1
+
+providers:
+  - name: 'AI Stack Dashboards'
+    orgId: 1
+    folder: 'AI Stacks'
+    type: file
+    disableDeletion: false
+    editable: true
+    options:
+      path: /var/lib/grafana/dashboards