#sentry

[Messenger Load-Testing, Part 3] FCM to a Queue, Swallowed Failures to Sentry — Cleaning Up the Message-Send Handler

Part 3 of load-testing a messenger: pulling FCM push out of the message-send handler into a dedicated worker queue, and surfacing the failures that used to vanish into empty catches through Sentry. Two axes — isolating external I/O and handling error logs.