fix: 完善数据预处理与 JSON 上传链路

backend/app/schemas/data_process.py

@@ -220,6 +220,19 @@ class DataProcessRegenerateRequest(BaseModel):
         return self
 
 
+class DataProcessRepeatRequest(BaseModel):
+    """按已确认任务的完整快照创建一批独立的新生成结果。"""
+
+    model_config = ConfigDict(extra="forbid")
+
+    expected_updated_at: str = Field(min_length=1)
+    request_id: str = Field(
+        min_length=8,
+        max_length=80,
+        pattern=r"^[A-Za-z0-9_-]+$",
+    )
+
+
 class PreviewBuildRequest(BaseModel):
     model_config = ConfigDict(extra="forbid")