BE sync

scripts/ensure-gradle-wrapper.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+# Ensure gradle/wrapper/* exists (often missing when .gitignore hid gradle/ or after git clean).
+set -euo pipefail
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+JAR="$ROOT/gradle/wrapper/gradle-wrapper.jar"
+PROPS="$ROOT/gradle/wrapper/gradle-wrapper.properties"
+
+if [[ -f "$JAR" && -f "$PROPS" ]]; then
+  exit 0
+fi
+
+echo "ERROR: Gradle wrapper missing at gradle/wrapper/" >&2
+echo "  expected: gradle-wrapper.jar + gradle-wrapper.properties" >&2
+echo "  fix: cd \"$ROOT\" && gradle wrapper --gradle-version 8.9" >&2
+echo "  note: .gitignore must NOT ignore gradle/wrapper/ (see repo .gitignore)" >&2
+exit 1