Patch: webhook redelivery and CLI fixes

A small patch release for two issues reported since 1.2.0.

#Fixed

• Webhook endpoints that answered with a 3xx redirect were treated as retryable failures, causing a redelivery loop until the retry budget ran out. Redirects are now followed once, then recorded as delivered or failed based on the final response.
• relay dev crashed on startup with Node 24.2 and newer due to a change in the built-in WebSocket client. The dev tunnel now pins its own client implementation.
• The delivery inspector no longer truncates response bodies at 4 KB.