😈 [Feature Enhancement] - <Review and fixes of Custom error changes in core and comm>

[zaryab2000]

Feature name

The custom error changes have been implemented but due to lack of test case or issues with migration , its possible that some bugs are still remaining.

Describe the Enhancement

A separate branch to mainly identify and resolve the following issues with custom error changes:

• Accuracy and intented behavior check
• Optimization checks
• Identify if there are lack of test cases for any specific scenario related to custom error changes (since most of those changes deal with important checkpoints/conditions)

POC if available

No response

Contract Name

Core Contract, Comm Contract, Push Staking V2