Fix: 修复存储文件名和拓扑构建逻辑

- 修正存储文件名: network-topology.db -> devices.json
- 移除handleGetDevices中的重复builder重建逻辑
- 移除冗余的调试日志输出
- 统一日志术语: database -> storage
- 确保添加设备时正确更新builder和存储

internal/topology/builder.go

@@ -50,15 +50,6 @@ func (b *Builder) Build() models.TopologyGraph {
 		}
 		nodeMap[device.IP] = node
 		graph.Nodes = append(graph.Nodes, node)
-		
-		// 调试信息
-		fmt.Printf("Node added: %s (%s) with %d neighbors\n", 
-			device.IP, device.Type, len(device.Neighbors))
-		for i, neighbor := range device.Neighbors {
-			fmt.Printf("  Neighbor %d: RemoteIP=%s, RemoteDevice=%s, LocalIf=%s, RemoteIf=%s\n",
-				i+1, neighbor.RemoteIP, neighbor.RemoteDevice, 
-				neighbor.LocalInterface, neighbor.RemoteInterface)
-		}
 	}
 
 	// 构建边(基于邻居信息)