added rsync disable in master global tier 1, advanced selection tier 2

Failover/failover.sh

@@ -471,6 +471,13 @@ run_handback() {
 
     info "Outage duration: ${outage_minutes}min"
 
+    # Check rsync gate before running any writeback
+    if ! check_rsync_enabled "FAILOVER"; then
+        warn "FAILOVER_RSYNC_ENABLED=false — skipping all writeback jobs"
+        warn "Handback will complete without syncing state back to primary"
+        return 0
+    fi
+
     run_writeback_tier() {
         local tier="$1"
         local threshold="$2"