fix(ChatKnowledge):full text storage truncate method error. (#1989)

dbgpt/storage/full_text/base.py

@@ -67,3 +67,7 @@ class FullTextStoreBase(IndexStoreBase):
 
     def delete_vector_name(self, index_name: str):
         """Delete name."""
+
+    def truncate(self) -> List[str]:
+        """Truncate the collection."""
+        raise NotImplementedError

dbgpt/storage/vector_store/base.py

@@ -187,3 +187,7 @@ class VectorStoreBase(IndexStoreBase, ABC):
             List[str]: chunk ids.
         """
         return await blocking_func_to_async(self._executor, self.load_document, chunks)
+
+    def truncate(self) -> List[str]:
+        """Truncate the collection."""
+        raise NotImplementedError