feat: Add CrossEncoder model to BgeRerank class

src/server/rerank.py

@@ -13,13 +13,12 @@ class BgeRerank(BaseDocumentCompressor):
     """Model name to use for reranking."""    
     top_n: int = 10   
     """Number of documents to return."""
-    model:CrossEncoder
+    model:CrossEncoder = None
     """CrossEncoder instance to use for reranking."""
 
     def __init__(self, model_name: str, top_n: int = 10):
-        self.model_name = model_name
+        super().__init__(model_name=model_name, top_n=top_n)
         self.model = CrossEncoder(model_name)
-        self.top_n = top_n
 
     def bge_rerank(self,query,docs):
         model_inputs =  [[query, doc] for doc in docs]