Add calibration setup heartbeats for CI

[MaxGhenis]

Summary

• add periodic CI heartbeats for long calibration setup stages
• wrap local and national target-matrix construction in those heartbeats
• add regressions for the stage heartbeat context and calibration setup logging

Testing

• PYTHONPATH=/Users/maxghenis/PolicyEngine/_codex_prs/policyengine-uk-data-calibration-setup-heartbeats /Users/maxghenis/PolicyEngine/policyengine-uk-data/.venv/bin/pytest /Users/maxghenis/PolicyEngine/_codex_prs/policyengine-uk-data-calibration-setup-heartbeats/policyengine_uk_data/tests/test_progress.py /Users/maxghenis/PolicyEngine/_codex_prs/policyengine-uk-data-calibration-setup-heartbeats/policyengine_uk_data/tests/test_calibration_progress.py
• /Users/maxghenis/PolicyEngine/policyengine-uk-data/.venv/bin/python -m ruff check policyengine_uk_data/utils/progress.py policyengine_uk_data/utils/calibrate.py policyengine_uk_data/tests/test_progress.py policyengine_uk_data/tests/test_calibration_progress.py
• /Users/maxghenis/PolicyEngine/policyengine-uk-data/.venv/bin/python -m py_compile policyengine_uk_data/utils/progress.py policyengine_uk_data/utils/calibrate.py policyengine_uk_data/tests/test_progress.py policyengine_uk_data/tests/test_calibration_progress.py