重构数据引擎和报表引擎

consts/api-feature/mapping_status.go

@@ -1,13 +1,9 @@
 package api_feature
 
-// MappingStatus 映射状态
+// MappingStatus 字段映射状态（暂未使用，保留供未来扩展）
 type MappingStatus string
 
 const (
-	MappingStatusActive   MappingStatus = "active"   // 启用
-	MappingStatusInactive MappingStatus = "inactive" // 停用
+	MappingStatusMapped   MappingStatus = "mapped"
+	MappingStatusUnmapped MappingStatus = "unmapped"
 )
-
-func (s MappingStatus) String() string {
-	return string(s)
-}