build(deps): bump sentry-sdk from 2.6.0 to 2.7.1 in /backend

Bumps [sentry-sdk](https://github.com/getsentry/sentry-python) from 2.6.0 to 2.7.1.
- [Release notes](https://github.com/getsentry/sentry-python/releases)
- [Changelog](https://github.com/getsentry/sentry-python/blob/master/CHANGELOG.md)
- [Commits](getsentry/sentry-python@2.6.0...2.7.1)

---
updated-dependencies:
- dependency-name: sentry-sdk
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>