fix(data-process): 修正任务详情数据契约

backend/app/modules/data_process/store.py

@@ -320,7 +320,12 @@ class DataProcessStore:
                                'name', dataset.name,
                                'type', dataset.type,
                                'count', dataset.count,
-                               'dataset_split', dataset.metadata::jsonb->>'dataset_split'
+                               'dataset_split', CASE dataset.type
+                                   WHEN 'train' THEN 'train'
+                                   WHEN 'val' THEN 'validation'
+                                   WHEN 'test' THEN 'test'
+                                   ELSE NULL
+                               END
                            ) ORDER BY CASE dataset.type
                                WHEN 'train' THEN 1 WHEN 'val' THEN 2 WHEN 'test' THEN 3 ELSE 4 END), '[]'::json)
                             FROM datasets dataset
@@ -1077,8 +1082,8 @@ class DataProcessStore:
                 """
                 UPDATE data_process_tasks
                 SET status='running', progress=30, failure_reason=NULL, started_at=%s,
-                    completed_at=NULL, filtered_count=0, duplicate_count=0, error_count=0,
-                    generation_run_id=%s, updated_at=%s
+                    completed_at=NULL, output_count=0, filtered_count=0,
+                    duplicate_count=0, error_count=0, generation_run_id=%s, updated_at=%s
                 WHERE id=%s
                 RETURNING *
                 """,