Function on_ws_close 

pub(super) fn on_ws_close(
    core: &mut ProtocolCore,
    close_code: u16,
) -> Vec<Command>

handles websocket closure after a user was already in flight

there are three different cases here and mixing them up is the main way to break reconnect behavior:

• terminal close codes move to ConnectionState::Closed, clear the saved connect context, and suppress recovery
• non-terminal closes with saved connect context move to ConnectionState::Recovering and schedule the recovery timer
• non-terminal closes without saved connect context fall back to ConnectionState::Disconnected, because there is nothing safe to reconnect to

example:

Connected --on_ws_close(AuthFailed)--> Closed
Connected --on_ws_close(1011)--> Recovering