fix(gateway): reconnect on protocol errors

[shiftinv]

Summary

see this thread

WSMessage(type=<WSMsgType.ERROR: 258>, data=WebSocketError(<WSCloseCode.PROTOCOL_ERROR: 1002>, 'Received fragmented control frame'), extra=None)

This isn't reproducible¹, but apparently happened at least once. Blame cloudflare, I guess(?).

Checklist

• If code changes were made, then they have been tested
  • I have updated the documentation to reflect the changes
  • I have formatted the code properly by running pdm lint
  • I have type-checked the code by running pdm pyright
• This PR fixes an issue
• This PR adds something new (e.g. new method or parameters)
• This PR is a breaking change (e.g. methods or parameters removed/renamed)
• This PR is not a code change (e.g. documentation, README, ...)

Footnotes

1. ...unless you manually feed it one of these weird non-spec-compliant frames: bot._get_websocket(shard_id=0).socket._reader._protocol.data_received(bytes([0b00001001, 0])) ↩