Self-audit finding: the idempotency row is written before processing,
so a handler exception/500 followed by Stripe's retry would be
suppressed as a duplicate and the event silently dropped. On the error
path, delete the dedupe row so the retry reprocesses. (Bad-signature/
config 400s and the non-unique insert-error 500 never wrote the row, so
those were already clean.)
Moheeb Zara
ca34e5393a