Remove the /openflare prefix from management APIs (/api/v1/d/*) and move
Agent, Relay, and Tunnel protocol endpoints under /api/v1. Update Wavelet
frontend services and node client binaries to match.
Move OpenFlare route registration from RegisterCustomRoutes to
v1.RegisterV1Routes so business APIs are mounted directly at
/api/v1/openflare instead of under the /custom example prefix.
Update handler Swagger annotations, frontend service base paths,
and regenerated swagger docs accordingly.
ryan