Additive schema change (SCHEMA-03/D-03/D-04): new model TenderSource
(1:n Tender, @@unique[sourcePortal, sourceNoticeId], onDelete Cascade)
and a nullable Tender.fingerprint column + index. dedupKey stays
unchanged as the SCHEMA-02 upsert target.
Migration 20260723120000_add_tender_source applies in strict order
(Pitfall 5): table+column create, then one TenderSource row per
pre-existing Tender via SQL INSERT/SELECT, then the unique constraint.
Applied locally against the tessera dev DB (container IP, no host
port) — verified via psql: TenderSource count == Tender count == 2851.
backfill-tender-source.ts is a one-time script that computes
Tender.fingerprint via the Task-1 tenderFingerprint() function
(Decimal->number conversion for estimatedValue, T-13-01-03) — run via
the compiled dist/ output (source uses standard extensionless TS
imports for tsc compatibility). Confirmed: 2851/2851 rows backfilled,
idempotent re-run verified.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
