Fix tempo

**Phenomenon and reproduction steps**

**Root cause and solution**

**Impactions**

**Test method**

**Affected branch(es)**

* main

**Checklist**

- [ ] Dependencies update required
- [ ] Common bug (similar problem in other repo)

app/app/application/l7_flow_tracing.py

@@ -146,6 +146,8 @@ async def query(self):
         if not _id:
             trace_id = self.args.get("trace_id")
             _id = await self.get_id_by_trace_id(trace_id, time_filter)
+            _id = str(_id)
+            self.args._id = _id
         if not _id:
             return self.status, {}, self.failed_regions
         base_filter = f"_id={_id}"