Fork test: PR #1158 - feat: add is_valid_email row check function

[ghanse]

Automated sync from fork PR for CI testing.

Original PR: #1158

All tests, including unit and integration tests run on this PR (they are skipped for fork PRs).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.14%. Comparing base (7ac9576) to head (0bb06c0).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1165      +/-   ##
==========================================
+ Coverage   92.10%   92.14%   +0.03%     
==========================================
  Files         101      101              
  Lines        9546     9555       +9     
==========================================
+ Hits         8792     8804      +12     
+ Misses        754      751       -3     

Flag	Coverage Δ
anomaly	53.57% <87.50%> (+0.03%)	⬆️
anomaly-serverless	53.59% <87.50%> (+0.04%)	⬆️
integration	50.42% <12.50%> (-0.21%)	⬇️
integration-serverless	50.59% <12.50%> (-0.05%)	⬇️
unit	55.92% <100.00%> (+0.04%)	⬆️

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[github-actions]

✅ 721/721 passed, 1 flaky, 39 skipped, 5h38m33s total

Flaky tests:

• 🤪 test_installation_stores_install_state_keys (28.621s)

_{Running from acceptance #4713}

[github-actions]

✅ 182/182 passed, 1 flaky, 5h56m22s total

Flaky tests:

• 🤪 test_internal_score_column_collision (1m32.972s)

_{Running from anomaly #827}