Remove vector stored in component output. (infiniflow#3908)

### What problem does this PR solve?

Close infiniflow#3805

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

agent/component/base.py

@@ -383,14 +383,17 @@ def __str__(self):
             "params": {}
         }
         """
+        out = json.loads(str(self._param)).get("output", {})
+        if isinstance(out, dict) and "vector" in out:
+            del out["vector"]
         return """{{
             "component_name": "{}",
             "params": {},
             "output": {},
             "inputs": {}
         }}""".format(self.component_name,
                      self._param,
-                     json.dumps(json.loads(str(self._param)).get("output", {}), ensure_ascii=False),
+                     json.dumps(out, ensure_ascii=False),
                      json.dumps(json.loads(str(self._param)).get("inputs", []), ensure_ascii=False)
         )