Bug: in Odoo 19, `required="1"` on a field inside an `invisible="..."`
group still triggers the missing-required-field flag — paints the
whole tab red on EVERY WO regardless of whether the field is shown.
Symptom: Process Details tab was red on masking, racking, oven, etc.
because the rack and mask groups' required fields were always
flagged as missing even when their parent group was hidden.
Fix: switch `required="1"` to `required="x_fc_wo_kind == 'rack'"` and
`required="x_fc_wo_kind == 'mask'"` so the required flag only fires
when the field is actually relevant. Matches the existing pattern
on bath/tank/oven (`required="x_fc_requires_bath"` etc.).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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