refactor(openflare): migrate console APIs to v1 and centralize routing

Move OpenFlare management endpoints to /api/v1/custom/openflare with
Wavelet response envelopes and Abort* error handling. Keep agent, relay,
and flared protocol routes on /api/* with the legacy compat format.

- Add apiutil helpers and Swagger annotations for console handlers
- Register all OpenFlare routes in internal/router/openflare (not apps)
- Switch frontend services to OpenFlareBaseService and v1 paths
- Remove dead auth/compat code and legacy-base.service.ts
- Update integration tests and changelog

Wavelet/frontend/app/(main)/proxy-routes/page-client.tsx

@@ -83,7 +83,7 @@ export function ProxyRoutesPageClient() {
 
     setDeleting(true);
     try {
-      await ProxyRouteService.delete(deleteTarget.id);
+      await ProxyRouteService.deleteById(deleteTarget.id);
       toast.success('网站已删除');
       setDeleteTarget(null);
       await fetchRoutes();