reranking client fix

src/clients/reranker_client.py

@@ -1,17 +1,19 @@
 from fastembed.rerank.cross_encoder import TextCrossEncoder
 from typing import Optional
 import logging
-from src.core.settings import settings
+
 logger = logging.getLogger(__name__)
 
 
 class RerankerClient:
-    def __init__(self, cache_dir: str = "./model_cache"):
-        self.model_name = settings.reranker_model
+    DEFAULT_MODEL = "jinaai/jina-reranker-v1-turbo-en"
+    
+    def __init__(self, model_name: Optional[str] = None, cache_dir: str = "./model_cache"):
+        self.model_name = model_name or self.DEFAULT_MODEL
         logger.info(f"Loading reranker: {self.model_name}")
         
         self.model = TextCrossEncoder(model_name=self.model_name, cache_dir=cache_dir)
         logger.info("Reranker ready")
     
     def rerank(self, query: str, documents: list[str]):
-        return list(self.model.rerank(query, documents))
+        return self.model.rerank(query, documents)