Remove hardcoded WebSocket headers from email middleware

FixEmailService
Shipped
March 17, 2026 at 11:07 PM UTC
Author
Kamo
Commit
1aa00f7

Traefik v3 handles WebSocket Upgrade/Connection headers natively. Hardcoding them broke SockJS fallback transports (xhr-streaming, xhr-polling). Now matches media-websocket-upgrade middleware pattern.

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