fix: export csv file contain tenant name

src/modules/network_data/controller/smf.go

@@ -134,6 +134,7 @@ func (s *SMFController) CDRExport(c *gin.Context) {
 		"H1": "Duration",
 		"I1": "Invocation Time",
 		"J1": "PDU Session Charging Information",
+		"K1": "Tenant Name", // for multi-tenancy
 	}
 	// 从第二行开始的数据
 	dataCells := make([]map[string]any, 0)
@@ -243,6 +244,11 @@ PDU Type: %s
 PDU IPv4 Address: %s
 PDU IPv6 Addres Swith Prefix: %s`, User_Identifier, SSC_Mode, RAT_Type, DNN_ID, PDU_Type, PDU_IPv4, PDU_IPv6)
 		}
+		// Tenant Name
+		tenantName := ""
+		if v, ok := cdrJSON["tenantName"]; ok && v != nil {
+			tenantName = v.(string)
+		}
 
 		dataCells = append(dataCells, map[string]any{
 			"A" + idx: row.ID,
@@ -255,6 +261,7 @@ PDU IPv6 Addres Swith Prefix: %s`, User_Identifier, SSC_Mode, RAT_Type, DNN_ID,
 			"H" + idx: duration,
 			"I" + idx: invocationTimestamp,
 			"J" + idx: pduSessionChargingInformation,
+			"K" + idx: tenantName,
 		})
 	}