Task A8. Closes Phase A of the direct-order rewrite.
Smoke-tested on odoo-entech: wizard accepts 3 lines (qty 65, total
\$3,025 + tax -> \$3,418.25), creates SO S00066 in state=sale with all
header fields (customer job #, three deadlines, bill/ship addresses)
and per-line fields (part, coating, qty, price) populated correctly.
Phase A complete. Phase B (blanket flag, block partial, WO grouping,
add-from-SO, missing-info banner polish) and Phase C (to-node picker,
quote link, push-defaults) outlined in the plan doc; Phases D/E/F
(SO detail, SO list, quotes list) are separate tracks.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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