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_async_tools.py

@@ -9,8 +9,9 @@ from src import mcp_client
 async def test_execute_tool_calls_concurrently_timing():
  """
  
-  Verifies that _execute_tool_calls_concurrently runs tools in parallel.
-  Total time should be approx 0.5s for 3 tools each taking 0.5s.
+  
+   Verifies that _execute_tool_calls_concurrently runs tools in parallel.
+   Total time should be approx 0.5s for 3 tools each taking 0.5s.
  """
  # 1. Setup mock tool calls (Gemini style)
  class MockGeminiCall:
@@ -67,8 +68,9 @@ async def test_execute_tool_calls_concurrently_timing():
 async def test_execute_tool_calls_concurrently_exception_handling():
  """
  
-  Verifies that if one tool call fails, it doesn't crash the whole group if caught,
-  but currently gather is used WITHOUT return_exceptions=True, so it should re-raise.
+  
+   Verifies that if one tool call fails, it doesn't crash the whole group if caught,
+   but currently gather is used WITHOUT return_exceptions=True, so it should re-raise.
  """
  class MockGeminiCall:
   def __init__(self, name, args):