build(deps): bump sentry-sdk from 2.38.0 to 2.39.0 in /backend

Bumps [sentry-sdk](https://github.com/getsentry/sentry-python) from 2.38.0 to 2.39.0.
- [Release notes](https://github.com/getsentry/sentry-python/releases)
- [Changelog](https://github.com/getsentry/sentry-python/blob/master/CHANGELOG.md)
- [Commits](getsentry/sentry-python@2.38.0...2.39.0)

---
updated-dependencies:
- dependency-name: sentry-sdk
  dependency-version: 2.39.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]