Two engine bugs caught by Task 19's integration tests:
1. Partial reconcile (bank_amount < invoice_residual) was creating an
unbalanced bank move. Counterpart balance now clamped to
min(remaining_bank_amount, abs(invoice_residual)) so the move stays
balanced; Odoo's reconcile() handles the resulting partial. The
counterpart's amount_currency is scaled proportionally so multi-
currency lines stay consistent.
2. Unreconcile only removed account.partial.reconcile rows but didn't
restore the suspense line on the bank move, leaving is_reconciled=True
after unreconcile. Now delegates to V19's standard
account.bank.statement.line.action_undo_reconciliation for any
affected bank line, which both deletes partials and restores the
suspense state in one shot.
Made-with: Cursor
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