Add ntfy wrapper for restore jobs

ops/restore-tests/send-ntfy.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+set -euo pipefail
+
+TOPIC="${1:-}"
+TITLE="${2:-}"
+MESSAGE="${3:-}"
+PRIORITY="${4:-default}"
+
+if [ -z "$TOPIC" ] || [ -z "$TITLE" ] || [ -z "$MESSAGE" ]; then
+  echo "Usage: $0 <topic> <title> <message> [priority]" >&2
+  exit 1
+fi
+
+NTFY_URL="${NTFY_URL:-https://ntfy.kaleschke.info}"
+
+curl -fsS \
+  -H "Title: $TITLE" \
+  -H "Priority: $PRIORITY" \
+  -d "$MESSAGE" \
+  "$NTFY_URL/$TOPIC" >/dev/null