fix(deploy): App-Home auf Pool statt read-only /opt (TrueNAS Goldeye)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

deploy/truenas/scripts/truenas-deploy.sh

@@ -16,7 +16,8 @@
 set -eu
 
 APP_NAME=gerbilmanager
-COMPOSE_DIR="${COMPOSE_DIR:-/opt/gerbilmanager}"
+# TrueNAS Goldeye: / (inkl. /opt) ist read-only -> App-Home liegt auf dem Pool.
+COMPOSE_DIR="${COMPOSE_DIR:-/mnt/JailStorage/DockerVolumes/gerbilmanager}"
 DEPLOY_DIR="$COMPOSE_DIR/deploy/truenas"
 ENV_FILE="${ENV_FILE:-$DEPLOY_DIR/.env}"
 TEMPLATE="$DEPLOY_DIR/custom-app.compose.yaml"