Full eCPS input coverage: 158 required columns, 8 evidence-backed exclusions

[MaxGhenis]

What

Full eCPS exported-input coverage for populace-us: every input column the retired enhanced-CPS pipeline exported is now either restored with non-default signal (158 required columns) or carries a reviewed exclusion with evidence of source unavailability (8 columns). The release input-coverage gate enforces the contract at build time — a reform keyed on a missing input fails the build instead of silently scoring $0.

The arc

Build J shipped with 65 required / 88 reviewed exclusions. This branch restores 93 input-column families across ~110 commits: SIPP tips, SCF auto loans, overtime/FLSA, education (with an AOTC abolition probe: $12.28B on pe-us 1.764.6), retirement contributions, casualty losses, miscellaneous itemized, childcare, alimony, the Section 199A/QBI family, capital-gain detail, Form 4952, prior-year income, housing/tenure, child support, SPM energy subsidy, SALT refund, typed household weights, demographic/labor descriptors including weeks unemployed, and source-calibrated take-up seeds (SSI, Head Start) — each as its own commit with targeted tests and a manifest promotion.

The 8 remaining exclusions (all evidence-backed)

employer_sponsored_insurance_premiums, financial_assistance, investment_interest_expense, is_unmarried_partner_of_household_head, is_wic_at_nutritional_risk, survivor_benefits, takes_up_dc_ptc, takes_up_early_head_start_if_eligible — each cites archived commit 42ed5d4 in the retired pipeline showing the derivation consumed a source (live fetches, MEPS-IC parameters, or restricted panels) that cannot exist in the hermetic build.

Integration with main

Merged (not rebased) origin/main: the SNAP state surface (#256, #371, #376), the PUMA geography ladder (#394), the loader-test decouple (#392), and --no-latest (#397). Six builder conflict hunks plus the us_runtime export merges were resolved with a both-lineages-survive discipline — main's snap_state_take_up stage, diagnostics write, and telemetry attachment run alongside the campaign's other_health_insurance and ssi_take_up stages; grep-verified family registrations from both sides.

Test evidence

• 83/83 targeted tests on the collision surfaces (coverage suites, take-up contract, snap/snap-state/ssi/medicaid take-up).
• Full populace-build suite on the merged tree: exit 0 (one credentialed-repo skip).
• Ruff clean.

Build M (the re-certification run producing the next certified default) follows this merge, with the dense-arm miscellaneous_income disposition per #393's final determination.