Fix auto metadata type issue (#15338)

### What problem does this PR solve?

Fix auto metadata type issue
https://github.com/infiniflow/ragflow/issues/15323

Type information is missing at frontend - backend correctly store the
type information for the auto metadata type.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/pages/dataset/components/metedata/hooks/use-manage-modal.ts

@@ -116,13 +116,13 @@ export const util = {
           description: item.description,
           values: item.enum || [],
           restrictDefinedValues: !!item.enum?.length,
-          valueType: DEFAULT_VALUE_TYPE,
+          valueType: item.type || DEFAULT_VALUE_TYPE,
         } as IMetaDataTableData;
       });
     }
     const properties = data.properties || {};
     return Object.entries(properties).map(([key, property]) => {
-      const valueType = 'string';
+      const valueType = property.type || 'string';
       const values = property.enum || property.items?.enum || [];
       return {
         field: key,

web/src/pages/dataset/components/metedata/interface.ts

@@ -12,6 +12,7 @@ export type IMetaDataReturnJSONType = Record<
 
 export interface IMetaDataReturnJSONSettingItem {
   key: string;
+  type?: string;
   description?: string;
   enum?: string[];
 }