test(multiplayer): add consolidated local gate

scripts/verify_multiplayer_local.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+godot_bin="${GODOT_BIN:-/Applications/Godot.app/Contents/MacOS/Godot}"
+
+if [[ ! -x "$godot_bin" ]]; then
+  echo "local multiplayer gate: Godot executable not found: $godot_bin" >&2
+  exit 2
+fi
+
+echo "local multiplayer gate: Go tests"
+(cd "$root_dir/server" && go test ./...)
+
+echo "local multiplayer gate: Godot harness"
+"$godot_bin" --headless --path "$root_dir/Game" res://tests/test_runner.tscn
+
+echo "local multiplayer gate: contracts and manifests"
+python3 -m json.tool "$root_dir/server/contracts/v1/openapi.json" >/dev/null
+python3 "$root_dir/server/migrations/test_migration.py"
+python3 "$root_dir/server/security/test_fleet_manifests.py"
+python3 "$root_dir/server/security/test_kubernetes_policies.py"
+python3 "$root_dir/server/security/test_supply_chain.py"
+
+echo "LOCAL MULTIPLAYER GATE PASS"