Polish MEV backend deploy helper ergonomics

scripts/deployment/deploy-mev-backend-ct2421-latest.sh

@@ -27,6 +27,7 @@ Options:
   --branch NAME          mev-platform branch to fast-forward (default: master)
   --parent-branch NAME   MEV_Bot branch to fast-forward (default: master)
   --api-key KEY          Optional API key for protected verification routes
+  --dry-run              Print the planned remote command (default behavior)
   --apply                Execute the deployment
   -h, --help             Show this help
 EOF
@@ -62,6 +63,10 @@ while [[ $# -gt 0 ]]; do
       API_KEY="$2"
       shift 2
       ;;
+    --dry-run)
+      APPLY=0
+      shift
+      ;;
     --apply)
       APPLY=1
       shift