feat: add Ollama provider and integration test

backend/requirements.txt

@@ -1,6 +1,6 @@
 fastapi==0.104.1
 uvicorn[standard]==0.24.0
-pydantic==2.5.0
+pydantic>=2.12.0
 pydantic-settings==2.1.0
 pytest==7.4.3
 pytest-cov==4.1.0

backend/src/dna/llm_providers/ollama_provider.py

@@ -0,0 +1,25 @@
+import httpx
+from typing import Optional, Dict, Any
+
+from .llm_provider_base import LLMProviderBase
+
+class OllamaProvider(LLMProviderBase):
+    def __init__(self, model: str = "llama3", base_url: str = "http://localhost:11434"):
+        self.model = model
+        self.base_url = f"{base_url}/api/generate"
+
+    async def generate(self, prompt: str, options: Optional[Dict[str, Any]] = None)-> str:
+        payload = {
+            "model":self.model,
+            "prompt": prompt,
+            "stream": False
+        }
+        if options:
+            payload.update(options)
+
+
+        async with httpx.AsyncClient() as client:
+
+            response = await client.post(self.base_url, json=payload, timeout=90.0)
+            response.raise_for_status()
+            return response.json().get("response", "")       

backend/tests/test_ollama_provider.py

@@ -0,0 +1,25 @@
+import asyncio
+import ollama  # Check if the base library is working
+from src.dna.llm_providers.ollama_provider import OllamaProvider
+
+async def test():
+    # Sanity Check: Is the Ollama service running on your Arch Linux?
+    try:
+        ollama.list()
+    except Exception:
+        print("❌ Error: Ollama service is not running. Run 'ollama serve' in a terminal.")
+        return
+
+    provider = OllamaProvider()
+    print("Sending request to local Llama3... (CPU mode may be slow)")
+
+    try:
+        # We use await because OllamaProvider is likely an 'async' class
+        response = await provider.generate("Say 'Hello from Arch Linux'")
+        print(f"✅ Success! AI says: {response}")
+    except Exception as e:
+        print(f"❌ Test Failed: {e}")
+        print("Tip: Check if 'llama3' is installed by running 'ollama list'")
+
+if __name__ == "__main__":
+    asyncio.run(test())