The delivery detail point lookup queried WebhookDelivery by id and environment
only. The table is RANGE-partitioned on createdAt, so with no createdAt
predicate Postgres cannot prune and probes every daily partition.
The delivery id now embeds its mint timestamp (a 6-byte big-endian unix ms
prefix plus random bytes, base32hex encoded), and the engine stores that same
timestamp as the row's createdAt, so the id's timestamp is the partition key.
getDelivery recovers it from the friendlyId and adds it as an exact predicate,
pruning to the row's partition for every caller.
Eric Allam
f05f2f9945