Map remote connection failures

[samuel-williams-shopify]

Summary

• Map Errno::EPIPE and Errno::ECONNRESET from the HTTP/1 connection stream to Protocol::HTTP::RemoteError.
• Preserve the original socket exception as the cause.
• Mark affected connections non-persistent so they cannot be reused.
• Continue treating a reset while waiting for a request line as EOF, while invalidating the connection.

Testing

• bundle exec bake test
• bundle exec rubocop
• bundle exec bake decode:index:coverage lib