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.

src/theme_nerv.py

@@ -63,7 +63,8 @@ NERV_PALETTE = {
 
 def apply_nerv() -> None:
  """
- Apply NERV theme with hard edges and specific palette.
+ 
+  Apply NERV theme with hard edges and specific palette.
   [C: tests/test_theme_nerv.py:test_apply_nerv_sets_rounding_and_colors]
  """
  style = imgui.get_style()
@@ -84,4 +85,4 @@ def apply_nerv() -> None:
  style.frame_border_size = 1.0
  style.popup_border_size = 1.0
  style.child_border_size = 1.0
- style.tab_border_size = 1.0
+ style.tab_border_size = 1.0