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/apps/openflare/apiutil/middleware.go

@@ -0,0 +1,17 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package apiutil
+
+import (
+	"github.com/Rain-kl/Wavelet/internal/apps/admin"
+	"github.com/Rain-kl/Wavelet/internal/apps/oauth"
+	"github.com/gin-gonic/gin"
+)
+
+// AdminMiddlewares returns Wavelet-standard middlewares for OpenFlare console routes.
+// OpenFlare no longer distinguishes Admin vs Root tiers; all management endpoints share
+// the same gate: user.IsAdmin for session users, token_admin for Access Token callers.
+func AdminMiddlewares() []gin.HandlerFunc {
+	return []gin.HandlerFunc{oauth.LoginRequired(), admin.LoginAdminRequired()}
+}