Fix batch_size for vectordb (#1449)

embedchain/config/vectordb/weaviate.py

@@ -10,7 +10,9 @@ class WeaviateDBConfig(BaseVectorDbConfig):
         self,
         collection_name: Optional[str] = None,
         dir: Optional[str] = None,
+        batch_size: Optional[int] = 100,
         **extra_params: dict[str, any],
     ):
+        self.batch_size = batch_size
         self.extra_params = extra_params
         super().__init__(collection_name=collection_name, dir=dir)