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

src/orchestrator/production-deployer.ts

@@ -280,6 +280,18 @@ export class ProductionDeployer {
       registryId: config.registryId,
     });
 
+    state.progress = 52;
+    state.message = 'Setting environment variables for logging';
+
+    const envVars = [
+      `STACK_NAME=${config.stackName}`,
+      `USAGE_LOGGING_ENABLED=true`,
+      `LOG_INGEST_URL=${process.env.LOG_INGEST_URL || 'http://10.100.0.20:3102/ingest'}`,
+      `METRICS_PORT=9090`,
+    ].join('\n');
+
+    await this.client.setApplicationEnv(state.resources.applicationId, envVars);
+
     state.progress = 55;
     state.message = 'Creating persistent storage';