Add Open-Meteo hourly weather pipeline + queue/weather view

Backfills knoebels."LZ_open_meteo_hourly" from 2024-05-15 (start of queue
collection) and keeps it current. Imperial units; timestamps stored as naive
America/New_York to line up with the rest of the knoebels schema.

- weather_logger.py: --backfill uses the ERA5 Archive API; default mode does a
  self-healing recent sync via the Forecast API (past_days=7, upsert on conflict)
- docker-compose.yml: add `weather` oneshot service (also align scraper to its
  live `oneshot` profile)
- systemd/knb-weather.{service,timer}: nox user timer, every 6h (linger enabled)
- queries/dm_knb_queue_weather.sql: dm_knb_queue_weather view joining the full
  queue-time series to hourly weather (hour-bucketed), with a WMO code decode

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

systemd/knb-weather.timer

@@ -0,0 +1,12 @@
+[Unit]
+Description=Run the Knoebels weather sync every 6 hours
+
+[Timer]
+# Every 6 hours (00/06/12/18 ET). past_days=7 means each run refreshes the
+# last week, so a missed run self-heals and provisional values get refined.
+OnCalendar=*-*-* 00/6:00:00
+Persistent=true
+RandomizedDelaySec=300
+
+[Install]
+WantedBy=timers.target