feat: add async worker queues and retry controls

scripts/start_worker.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
+cd "$ROOT_DIR"
+
+source .venv/bin/activate
+
+eval "$(
+  .venv/bin/python - <<'PY'
+from fastapi_admin.config import (
+    LEAUDIT_WORKER_CONCURRENCY,
+    LEAUDIT_WORKER_QUEUE_NORMAL,
+    LEAUDIT_WORKER_QUEUE_URGENT,
+)
+
+print(f'WORKER_CONCURRENCY={LEAUDIT_WORKER_CONCURRENCY}')
+print(f'WORKER_QUEUES={LEAUDIT_WORKER_QUEUE_URGENT},{LEAUDIT_WORKER_QUEUE_NORMAL}')
+PY
+)"
+
+WORKER_NODE_NAME="leaudit_worker_${HOSTNAME:-local}_$$@%h"
+
+celery -A fastapi_admin.celery_app:celery_app worker \
+  -Q "${WORKER_QUEUES}" \
+  -n "${WORKER_NODE_NAME}" \
+  --concurrency="${WORKER_CONCURRENCY}" \
+  --loglevel=INFO