e2e tests: collect unstable tests statistics

[EugeniyKiyashko]

No description provided.

[Copilot]

Pull request overview

This PR adds infrastructure to identify, forward, and rerun “unstable” (flaky) TestCafe e2e tests in CI, collecting JSON reports to drive a dedicated “unstable” rerun job and reduce noise in regular test matrix jobs.

Changes:

• Mark specific e2e tests as unstable via test.meta({ unstable: true }) (and add an “only unstable” execution mode).
• Extend the TestCafe e2e runner to support: filtering by a report file, configurable retry attempts, and writing JSON reports for failures/unstable-forwarding.
• Update GitHub workflows to upload unstable reports from regular jobs and add a dedicated testcafe-unstable job that reruns forwarded failures + all meta-unstable tests.

Reviewed changes

Copilot reviewed 12 out of 13 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
e2e/testcafe-devextreme/tests/scheduler/common/dragAndDrop/appointmentCollector.ts	Marks a scheduler drag-n-drop test as unstable.
e2e/testcafe-devextreme/tests/editors/dateRangeBox/keyboard.ts	Removes disablePageReloads for the fixture; marks one test as unstable.
e2e/testcafe-devextreme/tests/editors/dateRangeBox/focus.ts	Marks one focus-related test as unstable.
e2e/testcafe-devextreme/tests/dataGrid/common/selection.ts	Marks a selection regression test as unstable.
e2e/testcafe-devextreme/tests/dataGrid/common/keyboardNavigation/keyboardNavigation.functional.ts	Marks one parameterized test variant as unstable via meta.
e2e/testcafe-devextreme/tests/common/treeList/stickyColumns/stickyColumns.ts	Narrows theme coverage for a screenshot test (genericLight only).
e2e/testcafe-devextreme/runner.ts	Adds report writing, filtering by tests file, onlyUnstable, and configurable retry attempts; forwards single failures as unstable.
apps/demos/utils/visual-tests/testcafe-runner.ts	Hard-disables TestCafe quarantine mode (env-driven toggle removed).
apps/demos/project.json	Removes TCQUARANTINE from the demos test env passthrough list.
.github/workflows/wrapper_tests.yml	Adjusts nx cache restore keys to prefer workflow build caches.
.github/workflows/visual-tests-demos.yml	Increases timeouts; removes TCQUARANTINE env usage in demos visual tests jobs.
.github/workflows/testcafe_tests.yml	Adds unstable-report upload, adds testcafe-unstable job to rerun forwarded + meta-unstable tests, and updates downstream job dependencies.

[Copilot]

Pull request overview

Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments.