fix: workflow file add related-id in iteration node (#16255)

Signed-off-by: kenwoodjw <blackxin55+@gmail.com>

api/core/file/enums.py

     TRANSFER_METHOD = "transfer_method"
     URL = "url"
     EXTENSION = "extension"
+    RELATED_ID = "related_id"
 
 
 class ArrayFileAttribute(StrEnum):

api/core/file/file_manager.py

             return file.remote_url
         case FileAttribute.EXTENSION:
             return file.extension
+        case FileAttribute.RELATED_ID:
+            return file.related_id
 
 
 def to_prompt_message_content(

web/app/components/workflow/constants.ts

     variable: 'url',
     type: VarType.string,
   },
+  {
+    variable: 'related_id',
+    type: VarType.string,
+  },
 ]
 
 export const DEFAULT_FILE_UPLOAD_SETTING = {

web/app/components/workflow/nodes/constants.ts

   { value: TransferMethod.remote_url, i18nKey: 'url' },
 ]
 
-export const SUB_VARIABLES = ['type', 'size', 'name', 'url', 'extension', 'mime_type', 'transfer_method']
+export const SUB_VARIABLES = ['type', 'size', 'name', 'url', 'extension', 'mime_type', 'transfer_method', 'related_id']
 export const OUTPUT_FILE_SUB_VARIABLES = SUB_VARIABLES.filter(key => key !== 'transfer_method')

web/app/components/workflow/nodes/loop/default.ts

   { value: TransferMethod.remote_url, i18nKey: 'url' },
 ]
 
-export const SUB_VARIABLES = ['type', 'size', 'name', 'url', 'extension', 'mime_type', 'transfer_method']
+export const SUB_VARIABLES = ['type', 'size', 'name', 'url', 'extension', 'mime_type', 'transfer_method', 'related_id']
 export const OUTPUT_FILE_SUB_VARIABLES = SUB_VARIABLES.filter(key => key !== 'transfer_method')
 
 export default nodeDefault

web/app/components/workflow/types.ts

   transfer_method: TransferMethod[]
   url?: string
   upload_file_id?: string
+  related_id?: string
 }
 
 export type WorkflowRunningData = {