Three fixes that unblock end-to-end invoice tests on staging:
1. Switched company default sale/purchase tax from '5% GST' to '13% HST'
(Ontario is the home province). New products auto-get 13% HST; fiscal
positions substitute OUT to other rates per customer location.
2. Added _migrate_tax_repartition_accounts hook. The post_init archive sweep
correctly archived legacy l10n_ca tax-tracking accounts (118100.OLD,
231000, 232000, 233000, 118400, 118500, etc.) but active taxes still
referenced them via repartition lines, causing invoice posting to fail
with 'account is archived'. Hook repoints repartition to Nexa's
consolidated 118100 (ITC) / 213100 (HST collected) / 213500 (QST
collected) accounts.
3. Odoo 19 fiscal position behavior change: empty tax_ids now means
'remove all taxes' (was 'pass-through' in v17/18). For ON home position
we now add a self-mapping placeholder (13% HST -> 13% HST) so the FP
has a non-empty tax_ids and map_tax falls through to pass-through
semantics on the 13% HST source.
Verified with 4 invoice tests on staging:
ON -> 13% HST total 113.00
US -> 0% GST total 100.00 (zero-rated export)
QC -> 14.975% total 114.98
Westin -> 13% HST total 169.50 (intercompany, RP-Associated tag)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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