feat(sdm): inject structural dependency mapping tags across codebase

Adds [C: caller] tags to functions/methods and [M: mutation] / [U: usage] tags to class variables based on cross-module call analysis.

tests/test_mma_concurrent_tracks_stress_sim.py

@@ -25,8 +25,9 @@ def _poll_mma_workers(client: api_hook_client.ApiHookClient, timeout: int, condi
 def test_mma_concurrent_tracks_stress(live_gui) -> None:
  """
  
-     Stress test: Start two tracks concurrently and verify they both progress
-     without crashing the GUI or losing state.
+  
+      Stress test: Start two tracks concurrently and verify they both progress
+      without crashing the GUI or losing state.
  """
  client = api_hook_client.ApiHookClient()
  assert client.wait_for_server(timeout=15), "Hook server did not start"