ci: Use sticky PR comments for Playwright report summaries (#6909)

Author: khvn26

.github/workflows/.reusable-docker-e2e-tests.yml

@@ -135,23 +135,33 @@ jobs:
           PR_TITLE: ${{ github.event.pull_request.title }}
           PR_URL: ${{ github.event.pull_request.html_url }}
 
-      - name: Comment PR with test results (success)
+      - name: Generate test report summary (success)
+        id: report-summary-success
         if: success() && github.event_name == 'pull_request'
         uses: daun/playwright-report-summary@v3
         with:
           report-file: frontend/e2e/playwright-report/results.json
           comment-title: 'Playwright Test Results (${{ steps.test-type.outputs.label }} - ${{ inputs.runs-on }})'
-          report-tag: 'playwright-${{ steps.test-type.outputs.label }}-${{ inputs.runs-on }}'
+          create-comment: false
           custom-info: |
             **🔄 Run:** [#${{ github.run_number }} (attempt ${{ github.run_attempt }})](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})
 
-      - name: Comment PR with test results (failure)
+      - name: Generate test report summary (failure)
+        id: report-summary-failure
         if: failure() && github.event_name == 'pull_request'
         uses: daun/playwright-report-summary@v3
         with:
           report-file: frontend/e2e/playwright-report/results.json
           comment-title: 'Playwright Test Results (${{ steps.test-type.outputs.label }} - ${{ inputs.runs-on }})'
-          report-tag: 'playwright-${{ steps.test-type.outputs.label }}-${{ inputs.runs-on }}'
+          create-comment: false
           custom-info: |
             **📦 Artifacts:** [View test results and HTML report](${{ steps.artifact-url.outputs.url }})
             **🔄 Run:** [#${{ github.run_number }} (attempt ${{ github.run_attempt }})](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})
+
+      - name: Comment PR with test results
+        if: always() && github.event_name == 'pull_request' && (steps.report-summary-success.outputs.summary || steps.report-summary-failure.outputs.summary)
+        uses: marocchino/sticky-pull-request-comment@v2
+        with:
+          header: playwright-e2e-results
+          append: true
+          message: ${{ steps.report-summary-success.outputs.summary || steps.report-summary-failure.outputs.summary }}