Fastapi refactor update

app/services/abc/training/kb.py

@@ -0,0 +1,10 @@
+from abc import ABC, abstractmethod
+
+from typing import List, Dict
+
+
+class IKnowledgeBase(ABC):
+
+    @abstractmethod
+    def query_knowledge_base(self, query: str, category: str, top_k: int = 5) -> List[Dict[str, str]]:
+        pass