fix: use try/except for relative+absolute import in pidmayuresh3 wrapper

Apply Copilot review suggestion — try relative import first
(from .pidmayuresh) for package-style usage, with fallback to
absolute import for direct script execution.

Author: GaneshPatil7517

tools/pidmayuresh3.py

@@ -20,7 +20,12 @@
 
 # Re-execute the canonical module so run-time behaviour is identical
 # when this file is invoked directly (e.g., via a study graph).
-from pidmayuresh import *  # noqa: F401,F403
+try:
+    # Prefer relative import when part of the tools package
+    from .pidmayuresh import *  # type: ignore[attr-defined]  # noqa: F401,F403
+except ImportError:
+    # Fallback for script-style execution (e.g., `python tools/pidmayuresh3.py`)
+    from pidmayuresh import *  # noqa: F401,F403