_fp_check_advance_post_shop: in_progress + all steps terminal →
awaiting_cert (cert required) or awaiting_ship. Auto-spawns cert
+ delivery and fires notifications. Idempotent. Does NOT raise —
gate failures bubble up via fp.job.step.button_finish (Task 4).
_fp_check_advance_after_cert_issue: awaiting_cert → awaiting_ship
when every required cert is state=issued.
_fp_check_regress_after_cert_void: awaiting_ship → awaiting_cert
when a previously-issued cert is voided. Re-notifies QM.
hasattr guards on _fp_schedule_cert_activity + _fp_resolve_cert_activities
keep this safe during incremental rollout — those land in Task 20.
Test scaffolding added covering helper existence + idempotency.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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