fix(connector): [ZSL] compare consr_paid_amt with the total amount for identifying partial payments

[AkshayaFoiger]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

Description

ZSL implements bank transfer payment, so the payment status is updated through webhooks.
Their webhook body has two fields for indicating the paid amount - paid_amt and consr_paid_amt we compared
paid_amt with total amount to identify the partial/over payments. But the field for what user paid is given in consr_paid_amt and what they will pay the merchant after fee is given in paid_amt.
In this Pr we are fixing this issue.

Hotfix for #5873

How did you test it?

As we cannot trigger the webhooks, we cannot test it in sandbox

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code
• I added unit tests for my changes where possible

[semanticdiff-com]

Review changes with SemanticDiff.

Analyzed 1 of 1 files.

Overall, the semantic diff is 45% smaller than the GitHub diff.

	Filename	Status
✔️	crates/router/src/connector/zsl/transformers.rs	44.84% smaller

The base branch was changed.