Fix: Update Groq API endpoint and clean config files

agent.py

@@ -16,7 +16,7 @@ def load_prompt(filename):
 def call_groq(system_prompt, user_input):
     headers = {"Authorization": f"Bearer {GROQ_API_KEY}"}
     payload = {
-        "model": "llama3-70b-8192",
+        "model": "deepseek-r1-distill-llama-70b",
         "messages": [
             {"role": "system", "content": system_prompt},
             {"role": "user", "content": user_input}