feat(observability): add metrics and monitoring for all 15 backends

- Add MetricsModule to 8 backends missing it (photos, zitare, mukke,
  planta, picture, storage, presi, nutriphi)
- Enable Prometheus scraping for all 15 backends in prometheus.yml
  (was only 6, with 3 commented out and 6 missing entirely)
- Update ServiceDown alert rule to cover all 15 backends
- Update Grafana dashboards (backends, master-overview, system-overview)
  with all backend services in health panels
- Fix imprecise regex in application-details dashboard

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/storage/apps/backend/package.json

@@ -24,6 +24,7 @@
 		"@manacore/shared-error-tracking": "workspace:*",
 		"@manacore/shared-nestjs-auth": "workspace:*",
 		"@manacore/shared-nestjs-health": "workspace:*",
+		"@manacore/shared-nestjs-metrics": "workspace:*",
 		"@manacore/shared-storage": "workspace:*",
 		"@nestjs/common": "^10.4.15",
 		"@nestjs/config": "^3.3.0",

apps/storage/apps/backend/src/app.module.ts

@@ -3,6 +3,7 @@ import { ConfigModule } from '@nestjs/config';
 import { ThrottlerModule } from '@nestjs/throttler';
 import { DatabaseModule } from './db/database.module';
 import { HealthModule } from '@manacore/shared-nestjs-health';
+import { MetricsModule } from '@manacore/shared-nestjs-metrics';
 import { FileModule } from './file/file.module';
 import { FolderModule } from './folder/folder.module';
 import { ShareModule } from './share/share.module';
@@ -25,6 +26,10 @@ import { AdminModule } from './admin/admin.module';
 		]),
 		DatabaseModule,
 		HealthModule.forRoot({ serviceName: 'storage-backend', route: 'api/v1/health' }),
+		MetricsModule.register({
+			prefix: 'storage_',
+			excludePaths: ['/health'],
+		}),
 		StorageModule,
 		FileModule,
 		FolderModule,