Panel pipeline: full plumbing for per-year snapshots (closes #345)#346

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feat/panel-persistent-ids-345

Commits on Apr 17, 2026

Add panel ID contract and consistency utility (#345)

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Apply ruff format to test_panel_ids.py

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Add create_yearly_snapshots helper (step 2 of #345)

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Add demographic ageing module (step 3 of #345)

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Thread time_period through local-area loss matrices (#345 step 4)

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Add cross-year smoothness penalty to calibrate_local_areas (#345 step 5)

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Add upload, fixture factory and downstream notes (#345 step 6)

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Fix TypeError when gender column uses pandas StringDtype (#345)

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Commits on Apr 20, 2026