feat: 完善模板对比持久化与附件版本处理

fastapi_modules/fastapi_leaudit/leaudit_bridge/tasks.py

@@ -532,19 +532,41 @@ async def _load_run_context(run_id: int) -> dict[str, Any]:
         if not document_file:
             raise ValueError(f"未找到 document_file_id={run.documentFileId} 对应的文件记录")
 
-        resolver = FileSourceResolver()
-        payload = await resolver.ResolvePayload(document_file)
-        attachmentResult = await session.execute(
+        mergedPdfResult = await session.execute(
             select(LeauditDocumentFile)
             .where(
                 LeauditDocumentFile.documentId == document.Id,
                 LeauditDocumentFile.isActive.is_(True),
-                LeauditDocumentFile.fileRole == "attachment",
+                LeauditDocumentFile.fileRole == "merged_pdf",
             )
-            .order_by(LeauditDocumentFile.Id.asc())
+            .order_by(LeauditDocumentFile.Id.desc())
+            .limit(1)
         )
-        attachmentFiles = list(attachmentResult.scalars().all())
-        attachmentPayloads = await resolver.ResolvePayloads(attachmentFiles) if attachmentFiles else []
+        mergedPdfFile = mergedPdfResult.scalar_one_or_none()
+        effective_document_file = mergedPdfFile or document_file
+
+        resolver = FileSourceResolver()
+        payload = await resolver.ResolvePayload(effective_document_file)
+        attachmentFiles: list[LeauditDocumentFile] = []
+        attachmentPayloads = []
+        if mergedPdfFile is not None:
+            attachmentFiles = []
+        elif str(getattr(document_file, "fileRole", "") or "").lower() != "primary":
+            attachmentFiles = []
+        elif str(getattr(document_file, "fileExt", "") or "").lower() not in {"pdf", "docx"}:
+            attachmentFiles = []
+        else:
+            attachmentResult = await session.execute(
+                select(LeauditDocumentFile)
+                .where(
+                    LeauditDocumentFile.documentId == document.Id,
+                    LeauditDocumentFile.isActive.is_(True),
+                    LeauditDocumentFile.fileRole == "attachment",
+                )
+                .order_by(LeauditDocumentFile.Id.asc())
+            )
+            attachmentFiles = list(attachmentResult.scalars().all())
+            attachmentPayloads = await resolver.ResolvePayloads(attachmentFiles) if attachmentFiles else []
 
         return {
             "document_id": document.Id,