feat(data-process): 完善后台生成与失败重试

backend/app/schemas/data_process.py

@@ -109,6 +109,24 @@ class DataProcessStatus(StrEnum):
     stopped = "stopped"
 
 
+class DataProcessWorkflowStep(StrEnum):
+    create = "create"
+    model = "model"
+    upload = "upload"
+    preview = "preview"
+    generate = "generate"
+    results = "results"
+
+
+class DataProcessPreviewStatus(StrEnum):
+    idle = "idle"
+    queued = "queued"
+    running = "running"
+    completed = "completed"
+    failed = "failed"
+    cancelled = "cancelled"
+
+
 class ProcessType(StrEnum):
     structured = "structured"
     unstructured = "unstructured"
@@ -164,6 +182,14 @@ class DataProcessTaskUpdate(BaseModel):
         return self
 
 
+class DataProcessWorkflowStepUpdate(BaseModel):
+    """仅保存创建向导位置，不修改配置或使下游产物失效。"""
+
+    model_config = ConfigDict(extra="forbid")
+
+    workflow_step: DataProcessWorkflowStep
+
+
 class DataProcessRegenerateRequest(BaseModel):
     """以一份完整配置准备任务重新生成。
 
@@ -288,6 +314,32 @@ class ResultUpdate(BaseModel):
     expected_updated_at: str | None = None
 
 
+class ResultRegenerateRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    expected_updated_at: str = Field(min_length=1, max_length=100)
+
+
+class ResultBatchRegenerateItem(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    result_id: str = Field(min_length=1, max_length=100)
+    expected_updated_at: str = Field(min_length=1, max_length=100)
+
+
+class ResultBatchRegenerateRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    items: list[ResultBatchRegenerateItem] = Field(min_length=1, max_length=100)
+
+    @model_validator(mode="after")
+    def validate_unique_results(self) -> "ResultBatchRegenerateRequest":
+        result_ids = [item.result_id for item in self.items]
+        if len(result_ids) != len(set(result_ids)):
+            raise ValueError("result_id values must be unique")
+        return self
+
+
 class DatasetSplit(BaseModel):
     model_config = ConfigDict(extra="forbid")