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_agent.go

@@ -0,0 +1,31 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package openflare
+
+import (
+	"github.com/Rain-kl/Wavelet/internal/apps/openflare/agent"
+	"github.com/gin-gonic/gin"
+)
+
+func registerAgentRoutes(apiV1Router *gin.RouterGroup) {
+	agentRoute := apiV1Router.Group("/agent")
+	{
+		discoveryRoute := agentRoute.Group("/")
+		discoveryRoute.Use(agent.AgentRegisterAuth())
+		{
+			discoveryRoute.POST("/nodes/register", agent.RegisterHandler)
+		}
+
+		authorizedRoute := agentRoute.Group("/")
+		authorizedRoute.Use(agent.AgentAuth())
+		{
+			authorizedRoute.GET("/ws", agent.AgentWebSocketHandler)
+			authorizedRoute.POST("/nodes/heartbeat", agent.HeartbeatHandler)
+			authorizedRoute.GET("/config-versions/active", agent.GetActiveConfigHandler)
+			authorizedRoute.GET("/pages/deployments/:deployment_id/package", agent.DownloadPagesPackageHandler)
+			authorizedRoute.POST("/waf/ip-groups/sync", agent.SyncWAFIPGroupsHandler)
+			authorizedRoute.POST("/apply-logs", agent.ReportApplyLogHandler)
+		}
+	}
+}