Improve error handling when claim validation

[sadilchamishka]

Purpose

$subject

Related Issues

• Error message and description has duplicated info in attribute data type related operations and improve the error details for more clarity product-is#25395

The API response will have the error message and description.

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/17170729061

[Copilot]

Pull Request Overview

This PR improves error handling for claim validation by migrating from ClaimMetadataClientException to a more structured APIError approach with enhanced error messages and descriptions in the API response.

• Updated error handling methods to use handleClaimManagementClientError instead of direct exception throwing
• Enhanced error messages for better clarity and user understanding
• Removed unused input type constant and improved SCIM mapping validation logic

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
ServerClaimManagementService.java	Refactored exception handling to use structured API errors and improved validation logic
Constant.java	Updated error message descriptions for better clarity and user experience

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[jenkins-is-staging]

PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/17170729061
Status: success

[jenkins-is-staging]

Approving the pull request based on the successful pr build https://github.com/wso2/product-is/actions/runs/17170729061