Fix Fdrs sentry issue on cronjob

[susilnem]

Addresses

• FDRS Sentry issue

fdrs_data_fetched_year = max(int(item["year"]) for item in fdrs_data.values())
TypeError: 'NoneType' object is not subscriptable

Changes

• Checking Empty value

Checklist

Things that should succeed before merging.

• [ ] Updated/ran unit tests
• [ ] Updated CHANGELOG.md

Release

If there is a version update, make sure to tag the repository with the latest version.

[thenav56]

Hey @szabozoltan69, please review and merge when you have time. This will fix the FDRS Sentry issue, the one you mentioned on the teams.

[szabozoltan69]

Merged, deployed to Staging. Thanks for the quick fix!