Verifies the bank_rec_bootstrap migration step (a) creates precedents
from existing partial.reconcile rows, (b) is idempotent on re-run, and
(c) refreshes the MV without erroring.
Three TransactionCase tests:
- test_bootstrap_creates_precedents_from_existing_reconciles seeds two
reconciles via the engine, wipes the auto-recorded precedents, then
asserts the bootstrap produces source='backfill' precedents.
- test_bootstrap_step_idempotent runs the bootstrap twice and asserts
the second pass creates zero new precedents.
- test_bootstrap_refreshes_mv_without_error runs the bootstrap on a
clean partner and asserts no exception is raised and the result dict
reports MV + pattern refresh outcomes.
Implementation fixes uncovered by these tests:
- precedent_backfill.backfill_precedents now pre-filters
account.partial.reconcile to rows that touch a bank statement line on
either side. Previously it walked every partial in the DB; on the
westin-v19 dev DB that's 16k rows and the default limit=10000 missed
the newest test fixtures (highest IDs).
- backfill skips the periodic env.cr.commit() when running under a
TestCursor, since committing inside a test breaks the rollback.
Test count: 139 -> 142.
Made-with: Cursor
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