Add migration script and harden module deploy SQL

- add scripts/migrate-stack.sh to export module images and sync project/storage to a remote host
  - ensure manage-modules-sql.sh applies module db-world/db-auth/db-characters and custom SmartAI fixes idempotently
  - stage AutoBalance configs with EndGameBoost disabled on every deploy
  - bump MySQL tmpfs size (MYSQL_RUNTIME_TMPFS_SIZE, default 8G) to avoid OOM/ENOSPC

scripts/migrate-stack.sh

@@ -0,0 +1,114 @@
+#!/bin/bash
+
+# Utility to migrate the current acore-compose stack to a remote host.
+# It assumes the module images have already been rebuilt locally.
+
+set -euo pipefail
+
+usage(){
+  cat <<EOF
+Usage: $(basename "$0") --host HOST --user USER [options]
+
+Options:
+  --host HOST           Remote hostname or IP address (required)
+  --user USER           SSH username on remote host (required)
+  --port PORT           SSH port (default: 22)
+  --identity PATH       SSH private key (passed to scp/ssh)
+  --project-dir DIR     Remote directory for the project (default: ~/acore-compose)
+  --tarball PATH        Output path for the image tar (default: ./acore-modules-images.tar)
+  --storage PATH        Remote storage directory (default: <project-dir>/storage)
+  --skip-images         Do not export/import Docker images
+  --help                Show this help
+
+Example:
+  $(basename "$0") --host wow.example.com --user deploy --identity ~/.ssh/id_ed25519 \
+    --project-dir /opt/acore-compose
+EOF
+}
+
+HOST=""
+USER=""
+PORT=22
+IDENTITY=""
+PROJECT_DIR=""
+TARBALL=""
+REMOTE_STORAGE=""
+SKIP_IMAGES=0
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --host) HOST="$2"; shift 2;;
+    --user) USER="$2"; shift 2;;
+    --port) PORT="$2"; shift 2;;
+    --identity) IDENTITY="$2"; shift 2;;
+    --project-dir) PROJECT_DIR="$2"; shift 2;;
+    --tarball) TARBALL="$2"; shift 2;;
+    --storage) REMOTE_STORAGE="$2"; shift 2;;
+    --skip-images) SKIP_IMAGES=1; shift;;
+    --help|-h) usage; exit 0;;
+    *) echo "Unknown option: $1" >&2; usage; exit 1;;
+  esac
+done
+
+if [[ -z "$HOST" || -z "$USER" ]]; then
+  echo "--host and --user are required" >&2
+  usage
+  exit 1
+fi
+
+PROJECT_DIR="${PROJECT_DIR:-/home/${USER}/acore-compose}"
+REMOTE_STORAGE="${REMOTE_STORAGE:-${PROJECT_DIR}/storage}"
+TARBALL="${TARBALL:-$(pwd)/acore-modules-images.tar}"
+
+SCP_OPTS=(-P "$PORT")
+SSH_OPTS=(-p "$PORT")
+if [[ -n "$IDENTITY" ]]; then
+  SCP_OPTS+=(-i "$IDENTITY")
+  SSH_OPTS+=(-i "$IDENTITY")
+fi
+
+run_ssh(){
+  ssh "${SSH_OPTS[@]}" "$USER@$HOST" "$@"
+}
+
+run_scp(){
+  scp "${SCP_OPTS[@]}" "$@"
+}
+
+echo "⋅ Preparing project archive"
+TMP_PROJECT_ARCHIVE="$(mktemp -u acore-compose-XXXXXX.tar.gz)"
+tar --exclude '.git' --exclude 'storage/backups' --exclude 'storage/logs' \
+    --exclude 'acore-modules-images.tar' -czf "$TMP_PROJECT_ARCHIVE" -C "$(pwd)/.." "$(basename "$(pwd)")"
+
+if [[ $SKIP_IMAGES -eq 0 ]]; then
+  echo "⋅ Exporting module images to $TARBALL"
+  docker image save \
+    acore/ac-wotlk-worldserver:modules-latest \
+    acore/ac-wotlk-authserver:modules-latest \
+    > "$TARBALL"
+fi
+
+echo "⋅ Removing rebuild sentinel"
+rm -f storage/modules/.requires_rebuild || true
+
+echo "⋅ Syncing project to remote $USER@$HOST:$PROJECT_DIR"
+run_ssh "mkdir -p '$PROJECT_DIR'"
+run_scp "$TMP_PROJECT_ARCHIVE" "$USER@$HOST:/tmp/acore-compose.tar.gz"
+run_ssh "tar -xzf /tmp/acore-compose.tar.gz -C '$PROJECT_DIR' --strip-components=1 && rm /tmp/acore-compose.tar.gz"
+
+echo "⋅ Syncing storage to remote"
+run_ssh "mkdir -p '$REMOTE_STORAGE'"
+run_scp -r storage/* "$USER@$HOST:$REMOTE_STORAGE/"
+
+if [[ $SKIP_IMAGES -eq 0 ]]; then
+  echo "⋅ Transferring docker images"
+  run_scp "$TARBALL" "$USER@$HOST:/tmp/acore-modules-images.tar"
+  run_ssh "docker load < /tmp/acore-modules-images.tar && rm /tmp/acore-modules-images.tar"
+fi
+
+echo "⋅ Remote prepares completed"
+echo "Run the following on the remote host to deploy:"
+echo "  cd $PROJECT_DIR && ./deploy.sh --skip-rebuild --no-watch"
+
+rm -f "$TMP_PROJECT_ARCHIVE"
+echo "Migration script finished"