Update application files and fix LLM models, create new retriever class

application/retriever/retriever_creator.py

@@ -0,0 +1,15 @@
+from application.retriever.classic_rag import ClassicRAG
+
+
+
+class RetrieverCreator:
+    retievers = {
+        'classic': ClassicRAG,
+    }
+
+    @classmethod
+    def create_retriever(cls, type, *args, **kwargs):
+        retiever_class = cls.retievers.get(type.lower())
+        if not retiever_class:
+            raise ValueError(f"No retievers class found for type {type}")
+        return retiever_class(*args, **kwargs)