chore: apply ruff auto-fixes and remove dead AST scripts

tests/test_orchestrator_pm.py

@@ -1,6 +1,6 @@
 import unittest
 from typing import Any
-from unittest.mock import patch, MagicMock
+from unittest.mock import patch
 import json
 import orchestrator_pm
 import mma_prompts
@@ -32,7 +32,7 @@ class TestOrchestratorPM(unittest.TestCase):
   # Verify summarize call
   mock_summarize.assert_called_once_with(file_items)
   # Verify ai_client.send call
-  expected_system_prompt = mma_prompts.PROMPTS['tier1_epic_init']
+  mma_prompts.PROMPTS['tier1_epic_init']
   mock_send.assert_called_once()
   args, kwargs = mock_send.call_args
   self.assertEqual(kwargs['md_content'], "")