fp.step.template rows already held 'fa-bathtub' (1), 'fa-flag' (2),
and 'fa-undo' (2) — all plating-relevant and presumably valid in an
earlier version of the Selection list. When step_insert snapshot-
copied these into a fresh fusion.plating.process.node via
_copy_snapshot_fields, the ORM rejected them with
ValueError: Wrong value for fusion.plating.process.node.icon
because they weren't in the curated 39-icon list anymore.
Adding 'fa-bathtub' (bathtub / tank / soak), 'fa-flag' (flag /
milestone / gate), and 'fa-undo' (undo / rework / rerun) to the
process.node Selection. Aligns the two lists (template uses
_get_icon_selection -> node._fields['icon'].selection at runtime).
No data migration needed — existing template rows immediately
re-validate against the wider Selection.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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