feat: add marketplace metrics, privacy features, and service registry endpoints

- Add Prometheus metrics for marketplace API throughput and error rates with new dashboard panels
- Implement confidential transaction models with encryption support and access control
- Add key management system with registration, rotation, and audit logging
- Create services and registry routers for service discovery and management
- Integrate ZK proof generation for privacy-preserving receipts
- Add metrics instru

apps/wallet-daemon/README.md

@@ -19,7 +19,7 @@ Local FastAPI service that manages encrypted keys, signs transactions/receipts,
   - `COORDINATOR_API_KEY` (development key to verify receipts)
 - Run the service locally:
   ```bash
-  poetry run uvicorn app.main:app --host 0.0.0.0 --port 8071 --reload
+  poetry run uvicorn app.main:app --host 127.0.0.2 --port 8071 --reload
   ```
 - REST receipt endpoints:
   - `GET /v1/receipts/{job_id}` (latest receipt + signature validations)