Add year-based folders, attribution overlay, notifications, crontab/systemd

season_info.py
- Add ASTRO_YEAR: year of the Winter solstice that started the current cycle
  (Spring/Summer/Autumn 2026 → 2025; Winter Dec-2026 → 2026)

4-seasons.sh
- Daily clip output path now includes ASTRO_YEAR:
  movies/$name/$ASTRO_YEAR/$SEASON/Mvt$N/

montage-mvt.sh (full rewrite)
- Attribution is now a drawtext overlay (top 6 s of the video, fade in/out)
  instead of an appended black card — no frame-size matching needed, and
  year-end join requires no special handling
- Output path mirrors the new year-based folder structure
- Sends notification via notify.sh when done
- Automatically triggers year-end-join.sh after Autumn Mvt 3

year-end-join.sh (new)
- Concatenates all 12 movement montages for a given ASTRO_YEAR
- Output: movies/$name/$ASTRO_YEAR/$name-$ASTRO_YEAR.mp4
- Sends notification when done

notify.sh + notify_config.txt (new)
- Generic best-effort notification helper: ntfy, email, Mattermost text post
- All methods disabled by default; user fills in notify_config.txt

sky-cam.crontab + systemd/ (new)
- Crontab file: sunrise at 09:00, 4-seasons at 01:00, fullday at 02:00
- systemd .service + .timer units for all three daily jobs
- montage/year-end triggered internally, not by cron

https://claude.ai/code/session_01C4jbd3waXG3eKZYbGUjLUQ

systemd/README.txt

@@ -0,0 +1,40 @@
+Installing systemd timers
+========================
+
+1. Edit the ExecStart paths in each .service file to match where your scripts live.
+
+2. Copy units to the systemd user directory (no root needed):
+
+    mkdir -p ~/.config/systemd/user
+    cp sky-cam-*.service sky-cam-*.timer ~/.config/systemd/user/
+
+   Or system-wide (root required):
+
+    sudo cp sky-cam-*.service sky-cam-*.timer /etc/systemd/system/
+
+3. Reload and enable:
+
+    # User-level
+    systemctl --user daemon-reload
+    systemctl --user enable --now sky-cam-sunrise.timer
+    systemctl --user enable --now sky-cam-4seasons.timer
+    systemctl --user enable --now sky-cam-fullday.timer
+
+    # System-level (replace --user with no flag, add sudo)
+    sudo systemctl daemon-reload
+    sudo systemctl enable --now sky-cam-sunrise.timer
+    ...
+
+4. Check status:
+
+    systemctl --user list-timers sky-cam-*
+    journalctl --user -u sky-cam-4seasons.service -f
+
+Notes
+-----
+- Persistent=true means missed runs (e.g. system was off at 01:00) are
+  caught up on next boot, within the same day.
+- montage-mvt.sh and year-end-join.sh are NOT scheduled directly — they
+  are triggered automatically by 4-seasons.sh on the appropriate days.
+- notify.sh fires inside montage-mvt.sh and year-end-join.sh; it is not
+  a separate scheduled job.

systemd/sky-cam-4seasons.service

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+[Unit]
+Description=Sky-Cam Four Seasons daily clip (+ montage trigger on last day)
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=oneshot
+ExecStart=/home/motion/drives/local-2tb/sunrise-scripts/4-seasons.sh
+StandardOutput=journal
+StandardError=journal

systemd/sky-cam-4seasons.timer

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+[Unit]
+Description=Sky-Cam Four Seasons daily clip — 01:00
+
+[Timer]
+OnCalendar=*-*-* 01:00:00
+Persistent=true
+
+[Install]
+WantedBy=timers.target

systemd/sky-cam-fullday.service

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+[Unit]
+Description=Sky-Cam full-day timelapse (10-day retention)
+
+[Service]
+Type=oneshot
+ExecStart=/home/motion/drives/local-2tb/sunrise-scripts/fullday-video.sh
+StandardOutput=journal
+StandardError=journal

systemd/sky-cam-fullday.timer

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+[Unit]
+Description=Sky-Cam full-day timelapse — 02:00
+
+[Timer]
+OnCalendar=*-*-* 02:00:00
+Persistent=true
+
+[Install]
+WantedBy=timers.target

systemd/sky-cam-sunrise.service

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+[Unit]
+Description=Sky-Cam daily sunrise video → Mattermost
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=oneshot
+# ── Edit this path ────────────────────────────────────────────────────────────
+ExecStart=/home/motion/drives/local-2tb/sunrise-scripts/sunrise_video.10s.sh
+StandardOutput=journal
+StandardError=journal

systemd/sky-cam-sunrise.timer

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+[Unit]
+Description=Sky-Cam sunrise video — daily at 09:00
+
+[Timer]
+# Run at 09:00 every day (after sunrise window has ended).
+OnCalendar=*-*-* 09:00:00
+# If the system was off at 09:00, run as soon as it boots (within 1 hour).
+Persistent=true
+
+[Install]
+WantedBy=timers.target