feat(CI): Upload e2e error videos to GitHub

[emyller]

Experiment made with Claude Sonnet 4.

This is an attempt to improve our CI debugging workflow by moving e2e failure videos and/or screenshots as artifacts to each pull request. As of the creation of this issue, the team relies on a Slack channel that receives e2e video artifacts.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
flagsmith-frontend-preview	Ready	Preview, Comment	Jan 2, 2026 6:41pm
flagsmith-frontend-staging	Ready	Preview, Comment	Jan 2, 2026 6:41pm

1 Skipped Deployment

Project	Deployment	Review	Updated (UTC)
docs	Ignored	Preview	Jan 2, 2026 6:41pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-6023	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api-test:pr-6023	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-6023	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-6023	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-6023	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-6023	Finished ✅	Results ✅

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.07%. Comparing base (ed2f460) to head (dcbfa96).
⚠️ Report is 27 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6023   +/-   ##
=======================================
  Coverage   98.06%   98.07%           
=======================================
  Files        1292     1294    +2     
  Lines       46509    46535   +26     
=======================================
+ Hits        45611    45637   +26     
  Misses        898      898           

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[emyller]

At a glance, I don't know yet why Claude's approach didn't work. We'll wait to prioritize this correctly and maybe fit within a sprint.

[Zaimwa9]

Can we close this one and create an issue if needed please

[emyller]

Closing in favour of switching to PlayWright + Allure soon.