KI-AGENT: VPS-Asterisk Dev-Anbindung ergänzen

scripts/start-backend-vps-asterisk.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env sh
+set -eu
+
+ROOT_DIR="$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)"
+ENV_FILE="${FEDEO_VPS_ASTERISK_ENV_FILE:-$ROOT_DIR/telephony/vps-asterisk.env}"
+
+if [ ! -f "$ENV_FILE" ]; then
+  echo "Env-Datei nicht gefunden: $ENV_FILE" >&2
+  exit 1
+fi
+
+set -a
+. "$ENV_FILE"
+set +a
+
+cd "$ROOT_DIR/backend"
+exec npm run dev