IPTV.py now writes logs to a rotating file and forwards critical VLC
playback errors (start timeout, MediaPlayerEncounteredError) to the
server instead of losing everything to unredirected print() calls.
The web UI's device menu gets a working Terminal (to run diagnostic
commands like tail on the log) and a Recent errors view backed by a
capped last_errors list on each device document, keeping DB volume
bounded to the last 5 entries per device.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
