.github/pull_request_template.md

## Summary

<!-- The problem this solves and the outcome it produces. If the approach
is not the obvious one, say why. -->

Fixes #

<!-- Delete the line above if this PR closes no issue. Use "Refs #N" instead
when an issue is context only. -->

## Verification

<!-- The checks you actually ran and their results. Name relevant checks
you did not run. For user-visible changes, attach the lightest evidence
that demonstrates the behavior (screenshot, recording, or command output). -->

<!--
Add a section only when it changes how this PR should be reviewed,
released, or operated, and name it after the real risk: e.g.
Breaking change, Migration, Rollout, Root cause, Security, Review focus.
If work intentionally remains, open as a draft and track it with a
task list under its own section.
-->

## AI use

Select exactly one:

- [ ] No generative tool made a substantive contribution
- [ ] Generative tooling made a substantive contribution

<!-- If the second option applies, name the tool(s) and briefly describe their
scope. If AI authored material contribution content, add Generated-by trailers
to the affected commits and ensure the final squash commit retains the trailer. -->

Tool(s) and scope:

## Checklist

- [ ] Tests cover the change and fail without it
- [ ] Lint, format, typecheck and the affected suites pass locally

Does this PR entail a change in behavior?

- [ ] Yes — described under Summary above
- [ ] No