Show references

Show me every reference to the class DataValidator across the codebase and list the file path and line number for each occurrence. Prioritize references inside tests and the files under src/services, and open test/validator.test.js after gathering the list.

Before I ask QA to review changes, make approving this refactor easy: surface whether DataValidator is subclassed anywhere, highlight calls that pass plain objects instead of validated models, and flag references inside configuration files or scripts that might run outside the test harness.

I searched for DataValidator and found many usages, some passing raw objects, some constructing with different options. I can't tell which callers assume prior validation and which expect the validator to run. Who should I talk to and what's the safest next step to avoid silently changing runtime behavior when I modify the validator?