feat(#369): install @mosaicstack/telemetry-client in API

- Add .npmrc with scoped Gitea npm registry for @mosaicstack packages
- Create MosaicTelemetryModule (global, lifecycle-aware) at
  apps/api/src/mosaic-telemetry/
- Create MosaicTelemetryService wrapping TelemetryClient with
  convenience methods: trackTaskCompletion, getPrediction,
  refreshPredictions, eventBuilder
- Create mosaic-telemetry.config.ts for env var integration via
  NestJS ConfigService
- Register MosaicTelemetryModule in AppModule
- Add 32 unit tests covering module init, service methods, disabled
  mode, dry-run mode, and lifecycle management

Refs #369

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/api/package.json

@@ -27,6 +27,7 @@
   "dependencies": {
     "@anthropic-ai/sdk": "^0.72.1",
     "@mosaic/shared": "workspace:*",
+    "@mosaicstack/telemetry-client": "^0.1.0",
     "@nestjs/axios": "^4.0.1",
     "@nestjs/bullmq": "^11.0.4",
     "@nestjs/common": "^11.1.12",