Mirror of the SO Internal variant for fp.job. Same body fields,
same per-box loop; Notes column reads x_fc_internal_description
from the first linked SO line (job.sale_order_line_ids[:1]).
Operator on the shop floor sees ops-internal notes without those
ever appearing on the customer-facing External sticker.
Verified on fp.job 2635 with seeded internal_description: Notes
column reads "INTERNAL JOB: handle with care, no rework on this
batch" — confirms the Job Internal variant's override path mirrors
the SO Internal variant's.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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