fix(cli): disable depth unless verify/refine enabled

- Ensure default extrinsics calibration runs with depth mode NONE
- Depth is only enabled when --verify-depth or --refine-depth is set
- Document opt-in behavior in notepad

py_workspace/calibrate_extrinsics.py

@@ -89,6 +89,9 @@ def main(
     }
     sl_depth_mode = depth_mode_map.get(depth_mode, sl.DEPTH_MODE.NONE)
 
+    if not (verify_depth or refine_depth):
+        sl_depth_mode = sl.DEPTH_MODE.NONE
+
     # 1. Load Marker Geometry
     try:
         marker_geometry = load_marker_geometry(markers)