Add comprehensive service status infrastructure

- Add SERVICE_STATUS.md: Complete analysis of all blackroad.systems services
- Add check_all_services.sh: Automated service health checker script
- Add minimal-service template: Production-ready FastAPI service template

Service Status Findings:
- All 9 services return 403 Forbidden (Cloudflare blocking)
- Services are deployed and DNS is working correctly
- Issue is Cloudflare WAF/security rules, not service implementation

Template Features:
- Complete syscall API compliance (/v1/sys/*)
- Railway deployment ready
- CORS configuration
- Health and version endpoints
- HTML "Hello World" landing page
- OpenAPI documentation

Existing Service Implementations:
✓ Core API (services/core-api)
✓ Public API (services/public-api)
✓ Operator (operator_engine)
✓ Prism Console (prism-console)
✓ App/Shell (backend)

Next Steps:
1. Configure Cloudflare WAF to allow health check endpoints
2. Use minimal-service template for missing services
3. Implement full syscall API in existing services
4. Test inter-service RPC communication

Refs: #125

templates/minimal-service/requirements.txt

@@ -0,0 +1,3 @@
+fastapi==0.104.1
+uvicorn[standard]==0.24.0
+python-multipart==0.0.6