pub fn new() -> Self {
        StoreBuilder {
            client: None,
            embedder: None,
            collection_name: None,
            search_filter: None,
            content_field: "page_content".to_string(),
            metadata_field: "metadata".to_string(),
            recreate_collection: false,
        }
    }
Create a new StoreBuilder object with default values.
src/vectorstore/qdrant/builder.rs