Bug #10: When an order has only one registration number (reg_2 is empty)
but the reg historically appeared in tractor-trailer bookings, the
'historical_primary_product_mismatch' flag falsely suggests that the
current tractor-only billing is incorrect. The operator (Sarah #10714)
correctly expects that billing only a tractor is the right action when
there's no trailer to bill.
This change suppresses the historical_primary_product_mismatch flag for
rows where reg_2 is empty, matching the operator expectation. The
underlying historical SQL already filters by reg_1 only; a follow-up
could narrow the history to orders with matching reg_2 patterns, but for
the reported false-positive this fix is sufficient.
- invoice_period_flag_service.php: add o.reg_2 to the row projection
and skip the historical mismatch loop when the current order's reg_2
is empty.
- InvoicePeriodFlagServiceTest.php: include reg_2 in the existing
historical mismatch test fixture so it still exercises the flag path.
MiniMax M3 Subagent
89aa895192