Fork test: PR #1104 - feat: Improved summary stats report for string datatype columns

[mwojtyczka]

Automated sync from fork PR for CI testing.

Original PR: #1104

All tests, including acceptance, anomaly, and performance 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 92.11%. Comparing base (80b029a) to head (17adbd6).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1121      +/-   ##
==========================================
+ Coverage   92.09%   92.11%   +0.02%     
==========================================
  Files         101      101              
  Lines        9484     9490       +6     
==========================================
+ Hits         8734     8742       +8     
+ Misses        750      748       -2     

Flag	Coverage Δ
anomaly	53.48% <0.00%> (+1.54%)	⬆️
anomaly-serverless	53.90% <0.00%> (+29.88%)	⬆️
integration	50.44% <100.00%> (-29.92%)	⬇️
integration-serverless	50.45% <100.00%> (+0.27%)	⬆️
unit	55.93% <0.00%> (-24.43%)	⬇️

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[github-actions]

✅ 701/701 passed, 41 skipped, 4h26m35s total

_{Running from acceptance #4472}

[github-actions]

✅ 182/182 passed, 13 flaky, 6h46m10s total

Flaky tests:

• 🤪 test_apply_anomaly_check_by_metadata_with_columns_autodiscovery (3m26.659s)
• 🤪 test_zero_config_training (3m17.5s)
• 🤪 test_apply_anomaly_check_by_metadata_with_multiple_checks (10.015s)
• 🤪 test_explicit_columns_no_auto_segment (10.015s)
• 🤪 test_apply_anomaly_multiple_checks_by_metadata (10.014s)
• 🤪 test_warnings_for_small_segments (10.014s)
• 🤪 test_apply_anomaly_check_by_metadata_with_contributions (3m58.295s)
• 🤪 test_anomaly_check_with_TEST_SCHEMA_info_column_name (3m58.588s)
• 🤪 test_ensemble_scoring_distributed_path (3m20.227s)
• 🤪 test_drift_detection_handles_constant_columns_in_scoring (3m18.173s)
• 🤪 test_apply_anomaly_checks (3m58.774s)
• 🤪 test_apply_anomaly_check_with_criticality_warn (3m58.871s)
• 🤪 test_drift_detection_skipped_on_small_batch (3m42.197s)

_{Running from anomaly #586}