caciarabot: weekends take a non-technical turn in the digest

Weekend days — in the bot’s own timezone, default Europe/Rome — now pull the daily digest’s candidate from Wikipedia under a non-technical topic filter instead of the configured tech sources, and the daily-thought Wikipedia rabbit hole uses the same filter on those days; weekdays are unchanged, and weekday Wikipedia draws stay unfiltered (00e467f, PR #1). is_weekend_in_bot_timezone() in llm/scheduler.py is the shared check, looks_technical() in llm/wikipedia.py the heuristic, and weekend Wikipedia picks skip the English-only page fetch so Italian reads come through. The same day’s second change fixes how updates land: deploy/update.sh now rebuilds, then does podman compose down and up -d, because up -d followed by restart could leave the old container running the previous image; the script deliberately keeps -v off down, so the bind-mounted config, media and data/ trees survive (bbaa82c, PR #2). The test suite stands at 174 passing.