Backfill reform_validation.json for buildo (Modal reproduction)

[DTrim99]

Puts current-release data on the External-checks tab (/populace/reforms), which has shown the empty state for Build M/O since the scheduled backfill broke on 7/21.

• Produced on a 64GB Modal container running the identical producer path (tools/reform_validation/backfill.py, unmodified, batch-checkpointed via the Chunk the baseline-levels batch so the reform-validation backfill survives the hosted runner #107 chunked-levels path) at the release-exact policyengine-us 1.764.6 / policyengine-core 3.26.11; provenance in the file's _backfill_note.
• 236 rows — the complete post-populace#513 payload: the first Census state SPM poverty-rate suite (104 percent-unit rows; rendering landed in Render percent-unit rate backtests correctly on the reforms page #108), the six tracker-informed state credit/deduction bills, three federal benchmark rows (ARPA CTC, ARPA childless EITC, CBO all-rates-+1pt), and the $1,200/person UBI mechanical check (matches Census person mass to −0.01%). Producer at populace 51fbd3f.
• gen-reform-overrides.mjs regenerated (5 overrides), bun run lint clean, reforms tests 9/9.

Workflow status caveat (updated 7/27): #107's chunking was necessary but not sufficient — the scheduled backfill still dies on ubuntu-latest (every 6-hour run through 7/27; even a single 16-spec levels chunk gets the runner shutdown signal ~5.5 min in). One baseline simulation plus the producer import stack no longer fits the 7GB hosted runner. So this override is currently the only path to Build O data, and future releases need either a manual Modal run like this one or the workflow re-pointed at Modal for the simulation step (GH Actions keeps the trigger/commit role; needs MODAL_TOKEN secrets on the repo) — proposal to follow separately.

The failing Vercel check is the fork-deploy authorization gate, not a build failure — needs a team member's authorize click (or ignore; the app deploys from main).

🤖 Generated with Claude Code

[vercel]

@DTrim99 is attempting to deploy a commit to the PolicyEngine Team on Vercel.

A member of the Team first needs to authorize it.

[DTrim99]

Superseded the payload in-place with the post-populace#513 regeneration (236 rows: +6 tracker-informed state bills, +3 federal benchmark rows, +the UBI mechanical check). Same release-exact engine versions; producer at populace 51fbd3f; the #107 chunked-levels path ran end-to-end on this Modal run. This is now the complete Build O artifact — ready to merge, and the External-checks tab has been empty for the current release since 7/17, so review would be appreciated. Note the scheduled workflow is still failing post-#107 (separate cause, investigating now — this PR unblocks the dashboard regardless).

[PavelMakarchuk]

Reviewed and verified locally:

• Registry entry matches gen-reform-overrides.mjs output exactly (re-ran the generator on the branch — zero diff) and keeps alphabetical order.
• Schema matches the consumer: top-level keys identical to the buildj override; the new per-row unit field is the #108 addition, and the parser defaults missing unit to currency, so the 58 rows without it are fine.
• Claimed counts are accurate: 236 rows, 104 percent-unit Census state SPM rows.
• Independently verified the UBI mechanical check: 340,110,988 × $1,200 = $408.133B matches the stored anchor exactly; the populace total of $408.096B is −0.009% off, matching the claimed −0.01%.
• Reforms tests 9/9 and tsc --noEmit clean on the branch.

The Vercel failure is just the fork-deploy authorization gate. LGTM — this unblocks the empty External-checks tab now, and remains fine to merge even if #112 lands first.