test: add multi-report merge test for issue

[Ma11hewThomas]

Adds two dummy CTRF shard reports simulating Playwright sharded runs:

• shard-1: 53 tests (24 passed, 3 failed, 26 skipped)
• shard-2: 49 tests (34 passed, 3 failed, 12 skipped)
• Expected merged: 102 tests, 58 passed, 6 failed, 38 skipped

Adds workflow that triggers on PR to test whether the summary table shows merged totals or only a single shard's data.

Do not merge

[github-actions]

Issue #258 - Multi-report merge test

Summary

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Other ❓	Flaky 🍂	Duration ⏱️
102	58	6	38	0	0	35.0s

test-multi-report-summary: Run #1

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Pending ⏳	Other ❓	Flaky 🍂	Duration ⏱️
102	58	6	38	0	0	0	35.0s

❌ Some tests failed!

Name	Failure Message
❌ Project permissions restrict access	Expected 403 response but got 200
❌ Team activity log is accurate	Activity log missing last 2 entries
❌ Bulk file delete works	Expected 0 files remaining but found 2
❌ MFA prompt appears for enabled accounts	Expected MFA dialog to be visible
❌ Notification bell shows unread count	Expected badge count to be 3, got 0

See all failed tests here

Github Test Reporter by CTRF 💚

[github-actions]

build-and-test: Run #1394

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Pending ⏳	Other ❓	Flaky 🍂	Duration ⏱️
77	77	0	0	0	0	0	12.8s

🎉 All tests passed!

Github Test Reporter by CTRF 💚

[github-actions]

Issue #258 - Multi-report merge test

Summary

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Other ❓	Flaky 🍂	Duration ⏱️
102	58	6	38	0	0	35.0s

test-multi-report-summary: Run #2

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Pending ⏳	Other ❓	Flaky 🍂	Duration ⏱️
102	58	6	38	0	0	0	35.0s

❌ Some tests failed!

Name	Failure Message
❌ Project permissions restrict access	Expected 403 response but got 200
❌ Team activity log is accurate	Activity log missing last 2 entries
❌ Bulk file delete works	Expected 0 files remaining but found 2
❌ MFA prompt appears for enabled accounts	Expected MFA dialog to be visible
❌ Notification bell shows unread count	Expected badge count to be 3, got 0

See all failed tests here

Github Test Reporter by CTRF 💚