chore: sync local updates

mengyamonitor-backend-client/main.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+	"log"
+	"os"
+)
+
+func main() {
+	addr := os.Getenv("CENTRAL_GRPC")
+	serverID := os.Getenv("SERVER_ID")
+	key := os.Getenv("AGENT_KEY")
+	if addr == "" || serverID == "" || key == "" {
+		log.Fatal("mengyamonitor agent requires CENTRAL_GRPC, SERVER_ID, and AGENT_KEY")
+	}
+	log.Printf("agent reporting via gRPC to %s (server_id=%s)", addr, serverID)
+	runGRPCLoop(addr, serverID, key)
+}