feat(backend): add service graph yaml

backend/cmd/main.go

@@ -106,6 +106,12 @@ func main() {
 	scriptManageHandlers := handlers.NewScriptHandlersGroup(scriptSvc, cmdr,
 		os.Getenv("WHEREAMI"))
 
+	graphPath := os.Getenv("GRAPH_YAML_PATH")
+	if graphPath == "" {
+		graphPath = "/etc/hellreign/services.yaml"
+	}
+	graphHandlers := handlers.NewGraphHandlers(graphPath)
+
 	agents := handlers.NewAgentsGroup(h, coll)
 	auth := handlers.AuthGroup{Handlers: h}
 	agentReg := handlers.NewAgentRegistrationGroup(h)
@@ -212,6 +218,16 @@ func main() {
 			jobsGroup.GET("/metrics", jobsHandlers.GetJobMetrics)
 		}
 
+		// Service dependency graph (requires admin permission)
+		graphGroup := v1.Group("/graph")
+		graphGroup.Use(auth.AuthMiddleware(), handlers.RequireAdmin())
+		{
+			graphGroup.GET("", graphHandlers.GetYAML)
+			graphGroup.PUT("", graphHandlers.UpdateYAML)
+			graphGroup.GET("/order", graphHandlers.StartupOrder)
+			graphGroup.GET("/cycle", graphHandlers.CycleCheck)
+		}
+
 		// Agent registration
 		agentRegGroup := v1.Group("/agents")
 		{