refactor:

- changed method get_agent_tools for only get_tools on agent interface
- changed OllamaModelManager to correc semantic OllamaService

test:
- added test for service initialization
- added tests to list tools and create tools into  PDF agent

test/service/test_service.py

@@ -0,0 +1,22 @@
+import unittest
+
+
+class TestService(unittest.TestCase):
+    def setUp(self):
+
+        pass
+
+    def test_service_initialization(self):
+        from src.service.service import Service
+
+        # Test Ollama service
+        ollama_service = Service("ollama")
+        self.assertIsNotNone(ollama_service.service)
+        self.assertEqual(ollama_service.service.__class__.__name__,
+                 "OllamaService")
+        
+        self.assertEqual(ollama_service.service.base_url,"http://localhost:11434")
+        print(len(ollama_service.service.get_available_models()))
+        self.assertGreater(len(ollama_service.service.get_available_models()), 0)
+        
+