switch back to SimpleVectorStore

because download/upload of a vector store dump is not yet implemented for QdrantVectorStore

app.py

@@ -204,7 +204,7 @@ def main():
             DocumentStore(
                 span_annotation_caption="adu",
                 relation_annotation_caption="relation",
-                vector_store=QdrantVectorStore(),
+                vector_store=SimpleVectorStore(),
             )
         )
         # wrap the pipeline and the embedding model/tokenizer in a tuple to avoid that it gets called