cmdRead now opens the file and reads incrementally, writing each chunk
to stdout immediately. This fixes streaming for stream-mode files (chat,
statewait, eventwait) which block per-Tread until data arrives.
The previous io.ReadAll approach buffered internally and never flushed
to stdout because stream files never return EOF.
No separate 'tail' command needed — 'read' just works for both
one-shot files (server returns data then EOF) and stream files
(server blocks between chunks).
Levi Neely
Ollie Agent