refactor(repo): consolidate openflare-server to root and move subprojects to internal/apps

- Merge all files inside openflare-server to the repository root directory.
- Relocate agent, relay, and flared subprojects from internal/ to internal/apps/.
- Combine docker-compose files and update build context paths to root.
- Update GitHub workflows and Dockerfiles to refer to new directories and package names.
- Rewrite Go package imports across all files.
- Resolve database renew test race condition and clean up docs.

internal/router/v1/openflare/register_proxy_route.go

@@ -0,0 +1,22 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package openflare
+
+import (
+	"github.com/Rain-kl/Wavelet/internal/apps/openflare/apiutil"
+	"github.com/Rain-kl/Wavelet/internal/apps/openflare/proxy_route"
+	"github.com/gin-gonic/gin"
+)
+
+func registerProxyRouteRoutes(apiGroup *gin.RouterGroup) {
+	proxyRouteGroup := apiGroup.Group("/proxy-routes")
+	proxyRouteGroup.Use(apiutil.AdminMiddlewares()...)
+	{
+		apiutil.RegisterCollection(proxyRouteGroup, "GET", proxy_route.GetProxyRoutes)
+		proxyRouteGroup.GET("/:id", proxy_route.GetProxyRouteHandler)
+		apiutil.RegisterCollection(proxyRouteGroup, "POST", proxy_route.CreateProxyRouteHandler)
+		proxyRouteGroup.POST("/:id/update", proxy_route.UpdateProxyRouteHandler)
+		proxyRouteGroup.POST("/:id/delete", proxy_route.DeleteProxyRouteHandler)
+	}
+}