user defined error msg for maximum upload of attachments

[deepikaSingh2711]

Describe your changes

-> Problem

When users configured a custom error message for the maximum attachment upload limit, the application always displayed the default message:

"Cannot upload more than X attachments."

instead of the user-defined custom message.

-> Root Cause

The leading application was using an incorrect configuration key mapping:

Incorrect: SDM.Attachments.maxCountError
Correct: SDM.maxCountError

As a result, the custom error message configuration was not being picked up.

-> Fix

Updated the key mapping in the leading application from SDM.Attachments.maxCountError to SDM.maxCountError to correctly resolve and display the user-configured error message when the maximum upload limit is exceeded.

-> Validation

Verified that the custom error message is displayed correctly when the attachment upload count exceeds the configured maximum limit.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist before requesting a review

• I follow Java Development Guidelines for SAP
• I have tested the functionality on my cloud environment.
• I have provided sufficient automated/ unit tests for the code.
• I have increased or maintained the test coverage.
• I have ran integration tests on my cloud environment.
• I have validated blackduck portal for any vulnerability after my commit.

Upload Screenshots/lists of the scenarios tested

• I have Uploaded Screenshots or added lists of the scenarios tested in description

Before fix

After fix

Single tenant Integration tests

https://github.com/cap-java/sdm/actions/runs/27815453016

Multi tenant Integration tests

https://github.com/cap-java/sdm/actions/runs/27814115842