Add federal SSI living arrangement classification and ISM/PMV framework#7907

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hua7450 wants to merge 13 commits intoPolicyEngine:mainfrom

hua7450:ssi-federal-living-arrangement

Commits on Mar 30, 2026

Add federal SSI living arrangement statuses (A/B/C/D) and ISM/PMV framework

hua7450
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claude
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Commits on Mar 31, 2026

Rename enum to descriptive legal terms, fix PMV exclusion, add rebuttal and food support

hua7450
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claude
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Fix deeming PMV formula and food_counts effective date

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claude
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Commits on Apr 1, 2026

Commits on Apr 2, 2026

remove working_references.md
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Commits on Apr 6, 2026

Commits on Apr 8, 2026