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_dashboard.go

@@ -0,0 +1,18 @@
+// 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/dashboard"
+	"github.com/gin-gonic/gin"
+)
+
+func registerDashboardRoutes(apiGroup *gin.RouterGroup) {
+	dashboardRoute := apiGroup.Group("/dashboard")
+	dashboardRoute.Use(apiutil.AdminMiddlewares()...)
+	{
+		dashboardRoute.GET("/overview", dashboard.GetOverviewHandler)
+	}
+}