Bump sentry-sdk from 2.50.0 to 2.51.0 in /backend

Bumps [sentry-sdk](https://github.com/getsentry/sentry-python) from 2.50.0 to 2.51.0.
- [Release notes](https://github.com/getsentry/sentry-python/releases)
- [Changelog](https://github.com/getsentry/sentry-python/blob/master/CHANGELOG.md)
- [Commits](getsentry/sentry-python@2.50.0...2.51.0)

---
updated-dependencies:
- dependency-name: sentry-sdk
  dependency-version: 2.51.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

backend/pyproject.toml

@@ -22,7 +22,7 @@ dependencies = [
     "pyjwt==2.10.1",
     "python-dotenv==1.2.1",
     "python-multipart==0.0.22",
-    "sentry-sdk==2.50.0",
+    "sentry-sdk==2.51.0",
     "sqlalchemy==2.0.44",
     "sqlalchemy-stubs==0.4",
     "starlette==0.49.1",