Front change history: Increased error rate sending and receiving messages on email-based channels

Front reported a major incident affecting Gmail, O365, and SMTP (non-Gmail / O365) message sending and receiving from 2024-09-27 20:25 UTC to 2024-09-28 02:51 UTC (6 h 26 min). A manually deployed fix circumvented a Docker outage; delivery recovered with residual backlog delays. us-west-2 and eu-west-1 recovered before us-west-1.