💚(ci) improve E2E tests

Disable retries and save trace for failed tests.

💚(ci) preserve server logs

Save server logs to the same place as Playwright reports to aid debugging.

💚(ci) move back to 1 worker on CI

At least three reasons
- seems redundant with sharding
- strong suspicion it's the reason for the ValidationError issue
- that way the comment no longer tells a lie ;)

💚(ci) improve E2E tests

Log into CHANGELOG to ensure the new test results impact PR status 🤷

💚(ci) make dummy data creation more robust

This is a QR (Quick Response) fix for the failures in the "Add dummy
data" step in E2E testing. Proper QC (Quality Control) needs a bit
more thought.

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to
 
 ### Fixed
 
+- 💚(ci) improve E2E tests #492
 - 🔧(sentry) restore default integrations
 - 🔇(backend) remove Sentry duplicated warning/errors
 - 👷(ci) add sharding e2e tests  #467