feat: provider-resource-admission-ownership alignment
- Archive provider-resource-admission-ownership milestone/SDD
- Align contract: CP-edge wire, runtime refresh, node runtime, OpenAI surface
- Update roadmap: phase state, priority queue
- Update specs: control-plane ops, OpenAI surface, edge execution, provider pool refresh
- Add node runtime supervisor bootstrapping and unit tests
- Fix control-plane edge registry handler and http_views
- Fix edge model queue admission and long context queue tests