Create structural reform for house ACA proposal

[daphnehanse11]

fixes #6809

[codecov]

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[MaxGhenis]

Why does this need to be a structural reform? Can't we add 2026-01-01: 6 to this?

policyengine-us/policyengine_us/parameters/gov/aca/ptc_income_eligibility.yaml

Line 24 in 035f530

0000-01-01: 4.00

[PavelMakarchuk]

Why does this need to be a structural reform? Can't we add 2026-01-01: 6 to this?

policyengine-us/policyengine_us/parameters/gov/aca/ptc_income_eligibility.yaml

Line 24 in 035f530

0000-01-01: 4.00

Agreed, this feels like the simpler solution