v19.0.0

• 💥 [Deprecation] Drop support for python 3.8 and set Python 3.9 as the minimum supported python version. (by @Faraz32123)
• 💥[Improvement] Rename Tutor's two branches (by @DawoudSheraz):
  • Rename master to release, as this branch runs the latest official Open edX release tag.
  • Rename nightly to main, as this branch runs the Open edX master branches, which are the basis for the next Open edX release.
• 💥[Feature] Upgrade to Sumac. (by @Faraz32123)
• [BugFix] Uwsgi workers wasn't starting properly using UWSGI_WORKERS flag, passing the value directly fixes the issue. (by @Faraz32123)
• 💥[Feature] Update Credentials Image to use Ubuntu 24.04 as base OS. (by @Faraz32123)
  • Add mime-support alternatives that are media-types mailcap.
  • Update python-openssl to python3-openssl.
• [Bugfix] Fix legacy warnings during Docker build. (by @regisb)