fix: remove unused parent from macro update

[wakonig]

Description

fixing a bug in the macro update handler introduced by the transition away from static methods

[Copilot]

Pull request overview

This PR aligns the macro update callback API with how the Redis connector invokes callbacks (single message object, no extra “parent” argument), and updates the corresponding unit tests accordingly.

Changes:

• Remove the unused parent parameter from MacroUpdateHandler._macro_update_callback.
• Update test_user_macros.py to call _macro_update_callback(mock_msg) with the new signature.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
bec_lib/bec_lib/macro_update_handler.py	Simplifies _macro_update_callback signature to accept only the message object.
bec_lib/tests/test_user_macros.py	Updates macro update callback tests to match the new callback signature.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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