Replace two panics (initial scan_requests expect, event-queue read
expect) and a socket-event break with error logging + continuation. A
transient error reading the event queue or scanning requests must not
kill ptyd and take the whole pty subsystem down with it.
(Change found as uncommitted work in the fork; committing to preserve
it and unblock the clean-fork build gate.)
Red Bear OS
0683c020a5