Refactor agent API structure and add core functionality with FastAPI integration

agent_api/core/config.py

@@ -0,0 +1,7 @@
+from dotenv import load_dotenv
+from pathlib import Path
+import os
+
+load_dotenv(Path(__file__).resolve().parent.parent.parent / ".env")
+
+DEEPSEEK_API_KEY = os.getenv("DEEPSEEK_API_KEY")

agent_api/core/llm.py

@@ -0,0 +1,7 @@
+from openai import OpenAI
+from .config import DEEPSEEK_API_KEY
+
+client = OpenAI(
+    api_key=DEEPSEEK_API_KEY,
+    base_url="https://api.deepseek.com"
+)