[damccorm]

Summary

• Fixes the Performance alerting tool on Python load/performance/benchmark tests. failure in https://github.com/apache/beam/actions/runs/43109552076.
• Following Support PyArrow 26 in the Python SDK #40927 (which raised the pyarrow upper bound in setup.py to <27.0.0 and pinned pyarrow<26 in tox.ini for NumPy 1 environments), pip install -e .[gcp,test] in run_perf_alert_tool.yml installs pyarrow 26.0.1, and the subsequent pip install signal-processing-algorithms step downgrades numpy to 1.26.4 (signal-processing-algorithms requires numpy<2.0.0).
• When perf_analysis.py imports db_dtypes -> pyarrow, it fails with ImportError: pyarrow requires NumPy 2.0 or newer, found 1.26.4.
• Pin "pyarrow<26" in run_perf_alert_tool.yml to match the NumPy 1 environments in tox.ini.

Test Plan

• Trigger run_perf_alert_tool.yml on this PR branch.

Verification

• Triggered run_perf_alert_tool.yml workflow run on branch: 43119916176

[damccorm]

/gemini review

[github-actions]

📋 Review Summary

This PR pins pyarrow<26 in .github/workflows/run_perf_alert_tool.yml to resolve an ImportError caused by pyarrow>=26 requiring NumPy 2.0+ while signal-processing-algorithms constrains numpy<2.0.0. The change is minimal, targeted, and aligns with the NumPy 1 environment pins in sdks/python/tox.ini.

🔍 General Feedback

• No other workflows or test environments install signal-processing-algorithms, so scoping this pin to run_perf_alert_tool.yml is sufficient and appropriate.
• LGTM!

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