Adds three Boolean fields (x_fc_send_nadcap_cert, x_fc_send_mill_test,
x_fc_send_customer_specific) to res.partner, default False. Wires
aerospace/defence customers into the existing cert resolver so the
three orphan fp.certificate.certificate_type values become reachable.
Post-migrate idempotently backfills NULL -> FALSE on existing rows.
Sub: docs/superpowers/specs/2026-05-27-recipe-cert-toggles-design.md
Task: T1 of the implementation plan.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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