fix(logs): Make empty log pruning more robust by including sessions with missing metadata

tests/test_log_pruning_heuristic.py

@@ -64,6 +64,19 @@ class TestLogPruningHeuristic(unittest.TestCase):
   self.assertNotIn("recent_not_empty", session_ids)
   self.assertNotIn("old_w", session_ids)
 
+ def test_get_old_non_whitelisted_sessions_includes_sessions_without_metadata(self) -> None:
+  now = datetime.now()
+  cutoff_time = now - timedelta(days=7)
+  
+  # Recent, not whitelisted, NO metadata (should be included)
+  # _create_session without message_count/size_kb will leave metadata=None
+  self._create_session("recent_no_metadata", now - timedelta(days=1))
+  
+  sessions = self.registry.get_old_non_whitelisted_sessions(cutoff_time)
+  session_ids = {s['session_id'] for s in sessions}
+  
+  self.assertIn("recent_no_metadata", session_ids)
+
  def test_prune_removes_empty_sessions_regardless_of_age(self) -> None:
   now = datetime.now()
   
@@ -86,5 +99,25 @@ class TestLogPruningHeuristic(unittest.TestCase):
   self.assertFalse(os.path.exists(session_path))
   self.assertNotIn(session_id, self.registry.data)
 
+ def test_prune_removes_sessions_without_metadata_regardless_of_age(self) -> None:
+  now = datetime.now()
+  session_id = "recent_no_metadata_to_prune"
+  session_path = os.path.join(self.logs_dir, session_id)
+  os.makedirs(session_path, exist_ok=True)
+  # Actual file size 0
+  with open(os.path.join(session_path, "comms.log"), "w") as f:
+   pass
+   
+  self.registry.register_session(session_id, session_path, now - timedelta(hours=1))
+  # NO metadata update
+  
+  self.assertTrue(os.path.exists(session_path))
+  
+  # Prune with max_age_days=30
+  self.pruner.prune(max_age_days=30, min_size_kb=1)
+  
+  self.assertFalse(os.path.exists(session_path))
+  self.assertNotIn(session_id, self.registry.data)
+
 if __name__ == '__main__':
  unittest.main()