ci: Use sticky PR comments for Playwright report summaries

[khvn26]

• I have read the Contributing Guide.
• I have added information to docs/ if required so people know about the feature.
• I have filled in the "Changes" section below.
• I have filled in the "How did you test this code" section below.

Changes

In this PR, we migrate Playwright E2E test report PR comments from daun/playwright-report-summary direct commenting to marocchino/sticky-pull-request-comment. This ensures that on CI re-runs, the existing comment is updated in place rather than creating a new one each time, reducing notification spam.

• Use create-comment: false on daun/playwright-report-summary to generate the summary output only
• Post the summary via marocchino/sticky-pull-request-comment@v2 with a stable header key per test type and runner

How did you test this code?

Will be validated by the next PR that triggers E2E tests in CI.

[vercel]

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3 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs	Ignored	Preview	Mar 10, 2026 10:21am
flagsmith-frontend-preview	Ignored	Preview	Mar 10, 2026 10:21am
flagsmith-frontend-staging	Ignored	Preview	Mar 10, 2026 10:21am

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-api-test:pr-6909	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-e2e:pr-6909	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-frontend:pr-6909	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-6909	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-6909	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-api:pr-6909	Finished ✅	Results ✅

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.34%. Comparing base (a37f417) to head (f76ab3d).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6909   +/-   ##
=======================================
  Coverage   98.34%   98.34%           
=======================================
  Files        1335     1335           
  Lines       49707    49707           
=======================================
  Hits        48882    48882           
  Misses        825      825           

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[github-actions]

Playwright Test Results (oss - depot-ubuntu-latest-16)

 10 passed

Details

 10 tests across 7 suites
 27.9 seconds
 390bc21
 🔄 Run: #15199 (attempt 1)

[github-actions]

Playwright Test Results (oss - depot-ubuntu-latest-arm-16)

 10 passed

Details

 10 tests across 7 suites
 29.8 seconds
 390bc21
 🔄 Run: #15199 (attempt 1)

[github-actions]

Playwright Test Results (private-cloud - depot-ubuntu-latest-arm-16)

 16 passed

Details

 16 tests across 13 suites
 56.4 seconds
 390bc21
 🔄 Run: #15199 (attempt 1)

[github-actions]

Playwright Test Results (private-cloud - depot-ubuntu-latest-16)

 1 failed
 1 passed

Details

 2 tests across 2 suites
 55.2 seconds
 390bc21
 📦 Artifacts: View test results and HTML report
🔄 Run: #15199 (attempt 1)

Failed tests

firefox › tests/environment-permission-test.pw.ts › Environment Permission Tests › Environment-level permissions control access to features, identities, and segments @enterprise

[github-actions]

Playwright Test Results (oss - depot-ubuntu-latest-arm-16)

 10 passed

Details

 10 tests across 7 suites
 28.4 seconds
 f76ab3d
 🔄 Run: #15200 (attempt 1)

Playwright Test Results (oss - depot-ubuntu-latest-16)

 10 passed

Details

 10 tests across 7 suites
 44 seconds
 f76ab3d
 🔄 Run: #15200 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-16)

 1 passed

Details

 1 test across 1 suite
 1 minute, 4 seconds
 f76ab3d
 🔄 Run: #15200 (attempt 2)

Playwright Test Results (private-cloud - depot-ubuntu-latest-arm-16)

 2 passed

Details

 2 tests across 2 suites
 59.9 seconds
 f76ab3d
 🔄 Run: #15200 (attempt 2)

[khvn26]

Likely needs more tweaking (all runs are appended to a single comment which will probably blow it up all the way to the body length limit for long-living PRs), but I'd rather merge this sooner and open a follow-up PR.