修复：避免首事件间隙锁死锁

shierfeng-fastapi-backend/module_business/dao/inventory_dao.py

@@ -93,16 +93,21 @@ class InventoryDao:
         event: BizPalletEvent,
     ) -> BizPalletEvent:
         """在调用方持有库存行锁时，为托盘追加下一序号事件。"""
-        sequence_result = await db.execute(
-            select(BizPalletEvent.event_seq)
-            .where(BizPalletEvent.pallet_id == inventory.pallet_id)
-            .order_by(BizPalletEvent.event_seq.desc())
-            .limit(1)
-            .with_for_update()
-        )
-        last_sequence = sequence_result.scalar_one_or_none()
+        last_sequence = 0
+        if inventory.last_event_id is not None:
+            sequence_result = await db.execute(
+                select(BizPalletEvent.event_seq)
+                .where(
+                    BizPalletEvent.event_id == inventory.last_event_id,
+                    BizPalletEvent.pallet_id == inventory.pallet_id,
+                )
+                .with_for_update()
+            )
+            last_sequence = sequence_result.scalar_one_or_none()
+            if last_sequence is None:
+                raise RuntimeError('托盘库存事件指针不一致')
         event.pallet_id = inventory.pallet_id
-        event.event_seq = (last_sequence or 0) + 1
+        event.event_seq = last_sequence + 1
         db.add(event)
         await db.flush()
         inventory.last_event_id = event.event_id

shierfeng-fastapi-backend/module_business/entity/vo/operation_vo.py

@@ -31,6 +31,8 @@ def _validate_page_query_date_range(value: BaseModel) -> BaseModel:
     end_value = value.end_time
     begin_date = _parse_page_query_date(begin_value) if begin_value else None
     end_date = _parse_page_query_date(end_value) if end_value else None
+    if end_date and end_date.date() == datetime.max.date():
+        raise ValueError('结束日期必须早于 9999-12-31')
     if begin_date and end_date and begin_date > end_date:
         raise ValueError('开始日期不能晚于结束日期')
     return value