feat: Implemented graph-based RAG

src/graph/validator.rs

@@ -1027,6 +1027,9 @@ mod tests {
                 chunk_overlap: None,
                 reranker_model: None,
                 batch_size: None,
+                extractor_model: None,
+                extractor_prompt: None,
+                graph_hops: None,
                 state_updates,
                 timeout: None,
             }),