All five parsers (plex, syslog, servarr, qbittorrent, plaintext) were
using .replace(tzinfo=timezone.utc) on naive datetimes parsed from log
files, which slaps a UTC label on what is actually local-time data.
On a UTC-7 system a 2pm entry was stored as 14:00Z instead of 21:00Z,
causing time-window searches to return zero results.
Fix: use .astimezone(timezone.utc) instead, which treats the naive
datetime as local time and converts correctly.
Tests updated to round-trip back to local time for assertion so they
pass on any timezone, not just UTC.
scripts/syslog_receiver.py: asyncio UDP server listening on port 5140,
appends raw syslog lines to network-syslog.txt for the Turnstone live
watcher to tail. Requires no root — port 5140 is non-privileged.
scripts/turnstone-syslog-receiver.service: systemd unit for auto-start.
app/ingest/syslog.py: strip optional RFC 3164 <PRI> prefix before
parsing so network-forwarded syslog (OpenWRT logd, Arista EOS, etc.)
is handled correctly without the PRI value breaking the regex.