Port Thesis official-observation facts (49 rows on codex/thesis-ledger-facts) into source packages

What

Port the Thesis official-observation facts from the codex/thesis-ledger-facts branch into proper source packages, now that the schema types assertions (#73).

⚠️ Scope correction (2026-07-02): this is not just PR #52's five May-2026 BLS rows. The branch has kept recording after that PR went stale and is now 49 rows at tip fd612b5, spanning BLS Employment Situation, May CPI/PPI, MTS, weekly claims, BoC and ECB June decisions, UK April GDP, Canada April permits, SNAP QC and Medicaid PI benefits-delivery rates, and the FY2025 SNAP payment error rates that resolved the 2026-06-30 Thesis mass resolution. Do not delete the branch until every row is ported — it is the provenance archive for live Thesis resolutions.

Compatibility is already verified: all 49 rows load under the post-#73 schema with zero validation errors, default to assertion: observation, and keep distinct stable keys.

Shape

One declarative source package per publisher release (news-release HTML or data file as the content-addressed raw artifact, guard cells, full cell lineage), with assertion: observation and first-print vintages (may_2026_first_print). Stable source_record_ids must be preserved exactly — downstream Thesis resolutions reference them.

Notes

• Publishers revise (BLS payrolls, CPI): each print is its own source-release revision; first print and revisions are distinct facts under the same series, which the release-identity model already handles.
• The recording workflow that appends to the branch should switch to authoring source packages once this lands.

Inspect the 49 rows on codex/thesis-ledger-facts at tip fd612b5 and the post-#73 schema before locating the source-package examples. Port every row with its raw artifact, guard cells, cell lineage, assertion, first-print vintage, and exact source_record_id; done means all 49 load with zero validation errors and the branch remains available as provenance.