🛠 Refactor Normalization

[ashwinvaidya17]

Description

• Use a single placeholder for normalization metrics

Changes

• Refactor (non-breaking change which refactors the code base)

Checklist

• My code follows the pre-commit style and check guidelines of this project.
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing tests pass locally with my changes

[djdameln]

Thanks, this will be a nice improvement. Especially the changes to the inference part are much cleaner than before.