Problem:

Customer reported that the "test mapping" feature was not working properly for their GitLab integration

The test mapping UI couldn't properly process or validate their data source mapping

This made it difficult for customers to test and validate their integration mappings before deployment

Description:

Improve the test mapping functionality to better handle:

Large File Processing: Support for testing mappings on larger YAML files without performance issues

Multi-Document YAML: Better parsing and testing capabilities for multi-document YAML structures

Business Impact:

Reduces customer debugging time

Prevents integration failures in production

Improves customer confidence in mapping configurations