fix: ignore empty env vars so API health check can start

Co-authored-by: Cursor <cursoragent@cursor.com>

deploy/lib/common.sh

@@ -223,8 +223,10 @@ ensure_dotenv() {
   ensure_env_key "${envf}" "AUTH_SECRET" "鉴权密钥(disabled 关闭)" "change-me"
   ensure_env_key "${envf}" "ADMIN_USERNAME" "管理员用户名" "admin"
   ensure_env_key "${envf}" "ADMIN_PASSWORD" "管理员密码" "admin123"
+  ensure_env_key "${envf}" "BACKUP_DIR" "" "/root/market_intel_backups"
   ensure_env_key "${envf}" "BACKUP_AUTO_ENABLED" "自动备份 1/0" "1"
   ensure_env_key "${envf}" "BACKUP_INTERVAL_HOURS" "自动备份间隔小时" "24"
+  ensure_env_key "${envf}" "BACKUP_KEEP_COUNT" "" "30"
   ensure_env_key "${envf}" "OKX_API_KEY" "OKX API Key(可空)" ""
   ensure_env_key "${envf}" "OKX_API_SECRET" "OKX API Secret(可空)" ""
   ensure_env_key "${envf}" "OKX_API_PASSPHRASE" "OKX Passphrase(可空)" ""
@@ -323,7 +325,7 @@ verify_health() {
   local url="http://127.0.0.1:${port}/health"
   step "健康检查 ${url}"
   local i
-  for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15; do
+  for i in $(seq 1 30); do
     if curl -fsS "${url}" >/dev/null 2>&1; then
       log "health OK"
       curl -fsS "${url}" || true
@@ -332,7 +334,7 @@ verify_health() {
     fi
     sleep 2
   done
-  log "警告: health 暂未就绪，请检查: docker compose -f ${REPO_ROOT}/docker-compose.yml logs"
+  log "警告: health 暂未就绪，请检查: docker compose -f ${REPO_ROOT}/docker-compose.yml logs api --tail 80"
   return 1
 }