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/v1.go

@@ -0,0 +1,25 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package openflare
+
+import "github.com/gin-gonic/gin"
+
+// V1BasePath is the OpenFlare console API prefix under /api/v1.
+const V1BasePath = "/api/v1/d"
+
+// RegisterV1Routes mounts OpenFlare management console APIs under /api/v1/d.
+func RegisterV1Routes(apiV1Router *gin.RouterGroup) {
+	group := apiV1Router.Group("/d")
+	registerOptionRoutes(group)
+	registerOriginRoutes(group)
+	registerApplyLogRoutes(group)
+	registerProxyRouteRoutes(group)
+	registerNodeRoutes(group)
+	registerWAFRoutes(group)
+	registerTLSRoutes(group)
+	registerConfigVersionRoutes(group)
+	registerPagesRoutes(group)
+	registerDashboardRoutes(group)
+	registerObservabilityRoutes(group)
+}