OPF Dispatcher API (.NET)

Phase 1 scaffold — functional parity port of Node opf_bess/api. Node remains primary; this host is not on the compose cutover yet.

• OpenAPI JSON
• Swagger UI
• GET /api/v1/meta (route catalogue)
• Probes: /healthz, /health, /ready, /version

Stub routes return 501 not_implemented until parity phases land. Coordinate cutover with Optimizer and Brains Buddy.