Sunrise time overlay; systemd upload separation; bug fixes

daily_sunrise_video.sh:
- Fixed: was using undefined \$MOVIES_DIR (now \$BASE_DIR/movies)
- Fixed: sunrise_overlay.py was called but never existed — would fail daily
- Fixed: speed-adjust step had no explicit codec (-c:v libx264 missing)
- New: sunrise time overlaid as stacked vertical characters on the right
  side using ffmpeg drawtext — no Python/Pillow dependency
- New: upload removed from script; now triggered by systemd OnSuccess=
- Combines speed-adjust and overlay into one ffmpeg pass (was two)
- SUNRISE_OVERLAY_OPACITY from conf controls transparency

install.sh:
- sky-cam-sunrise.service gains OnSuccess=sky-cam-sunrise-upload.service
  so upload only runs when video creation succeeds, with separate log
- New sky-cam-sunrise-upload.service runs sunrise2mm.py

sunrise2mm.py: add shebang + chmod +x so systemd ExecStart= calls it directly

sky-cam.conf: add SUNRISE_OVERLAY_OPACITY=0.45

https://claude.ai/code/session_01C4jbd3waXG3eKZYbGUjLUQ

install.sh

@@ -75,10 +75,38 @@ EOF
 echo "  wrote sky-cam-notify-failure@.service"
 
 # ── Sunrise video — SUNRISE_CAM only ─────────────────────────────────────────
-write_service "sky-cam-sunrise" \
-    "$SUNRISE_CAM: daily sunrise video → Mattermost" \
-    "daily_sunrise_video.sh" \
-    "After=network-online.target\nWants=network-online.target\n"
+# OnSuccess= triggers the upload service only when video creation succeeds.
+cat > "$UNIT_DIR/sky-cam-sunrise.service" <<EOF
+[Unit]
+Description=Sky-Cam — $SUNRISE_CAM: daily sunrise video
+After=network-online.target
+Wants=network-online.target
+OnFailure=sky-cam-notify-failure@%n.service
+OnSuccess=sky-cam-sunrise-upload.service
+
+[Service]
+Type=oneshot
+ExecStart=$SCRIPT_DIR/daily_sunrise_video.sh
+StandardOutput=journal
+StandardError=journal
+EOF
+echo "  wrote sky-cam-sunrise.service"
+
+cat > "$UNIT_DIR/sky-cam-sunrise-upload.service" <<EOF
+[Unit]
+Description=Sky-Cam — $SUNRISE_CAM: upload daily sunrise to Mattermost
+After=network-online.target
+Wants=network-online.target
+OnFailure=sky-cam-notify-failure@%n.service
+
+[Service]
+Type=oneshot
+ExecStart=$SCRIPT_DIR/sunrise2mm.py
+StandardOutput=journal
+StandardError=journal
+EOF
+echo "  wrote sky-cam-sunrise-upload.service"
+
 write_timer "sky-cam-sunrise" "$SUNRISE_CAM: daily sunrise video" "$SCHEDULE_SUNRISE"
 
 timers=(sky-cam-sunrise)