Braze change history: AWS US East 1 outage

Braze reported a major AWS US East 1 outage starting 2025-10-20 16:21 UTC, resolved 2025-10-20 23:41 UTC. AWS capacity shortages delayed Data Processing and Outbound messaging on US03 and US05; affected Twilio services disrupted SMS authentication and messaging. Engineers load-balanced work and cleared backlogs; Twilio recovered.