Put the media seed behind MEDIA_SEED_ENABLED so a partner filled by other means never starts a multi-week transfer

Tier 2 beside the per-orchestrator gates. Unset reads as on — the toggle postdates the seed.

Deployment/master.conf.template

@@ -640,6 +640,14 @@
 #   WEEKLY_RSYNC_ENABLED=true         ← Emby + Critical-Data still sync (NVMe)
 #   MONTHLY_RSYNC_ENABLED=true        ← monthly_maintenance.sh rsync section
 #   FALLBACK_RSYNC_ENABLED=true       ← handback writeback still works
+#   MEDIA_SEED_ENABLED=false          ← the onboard first-fill never starts
+#
+# MEDIA_SEED_ENABLED is the odd one out: it does not gate a schedule, it gates a single
+# multi-week transfer. Rsync/media_seed.sh pushes every DAILY_SYNC_SHARES entry to a newly
+# onboarded partner — on HOST1 that is ~28 TB against BW_LIMIT, so weeks. Turn it off when the
+# partner is going to be filled some other way (a physically moved disk, an existing library),
+# and onboard will finish without ever starting it. Turning it back on does not start anything
+# by itself; dispatch it from the Partnership tab or run the script.
 #   → Run individual: bash Rsync/rsync.sh /mnt/user/Movies
 #   → When ready: INTERMEDIATE_RSYNC_ENABLED=true  DAILY_RSYNC_ENABLED=true
 #   NOTE ON THE DEFAULT: Tier 1 ships OFF. This template is what a brand-new node is seeded from
@@ -655,6 +663,7 @@
     WEEKLY_RSYNC_ENABLED=true           # Tier 2 — weekly_sync_maintenance.sh rsync section
     MONTHLY_RSYNC_ENABLED=true          # Tier 2 — monthly_maintenance.sh rsync section
     FALLBACK_RSYNC_ENABLED=true         # Tier 2 — fallback.sh writeback jobs on handback
+    MEDIA_SEED_ENABLED=true             # Tier 2 — Rsync/media_seed.sh, the onboard first-fill
 
 # ━━━ Download Webhook ━━━
 # Immediate push to remote nodes on every Sonarr/Radarr/Lidarr Download event.