Fresh home-feed API probes: 200 with complete modules/notifications
## PRM-63 backend issue solved
This PR completes the backend service registry/runtime work for PRM-63.
Changes include:
- Canonical service registry and gateway routing
- Gateway write-flow and generated content smoke coverage
- QScore fallback removal and route/data hardening
- User stack provisioning retry throttling
- Home feed href repair and agent-generation resilience
Validation run on gqr-vps:
- Service registry acceptance: ok=true, services=10, requiredServices=9
- QScore backend API: score=82, signalCount=7, signals=7
- Public QScore API unauthenticated guard: 401
- Fresh home-feed API probes: 200 with complete modules/notifications
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PRM-63 backend issue solved
This PR completes the backend service registry/runtime work for PRM-63.
Changes include:
Validation run on gqr-vps: