chore: establish V1.1 recovery baseline

infrastructure/scripts/gray-release.sh

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+#!/bin/bash
+# ============================================
+# 丹阳公益婚恋服务平台 — 灰度发布脚本
+# ============================================
+# 用法：
+#   ./scripts/gray-release.sh 10   # 10%流量灰度
+#   ./scripts/gray-release.sh 50   # 50%流量
+#   ./scripts/gray-release.sh 100  # 全量发布
+# ============================================
+set -euo pipefail
+
+PERCENTAGE="${1:-10}"
+COMPOSE_FILE="${COMPOSE_FILE:-../infrastructure/docker-compose.prod.yml}"
+
+if [ "${PERCENTAGE}" -lt 1 ] || [ "${PERCENTAGE}" -gt 100 ]; then
+    echo "错误: 灰度比例应在1-100之间"
+    exit 1
+fi
+
+echo "============================================"
+echo " 丹阳公益婚恋平台 — 灰度发布"
+echo " 灰度比例: ${PERCENTAGE}%"
+echo " $(date '+%Y-%m-%d %H:%M:%S')"
+echo "============================================"
+
+# 步骤1: 启动新版本容器（不暴露端口）
+echo "[1/4] 启动新版本容器（隐藏端口，不接收流量）..."
+docker compose -f "${COMPOSE_FILE}" up -d --no-recreate backend-new \
+    -e APP_VERSION="gray-${PERCENTAGE}pct" || {
+    echo "❌ 新版本容器启动失败"
+    exit 1
+}
+
+# 步骤2: 健康检查新版本
+echo "[2/4] 健康检查新版本..."
+sleep 15
+if curl -sf "http://localhost:8081/api/v1/health/ready" > /dev/null 2>&1; then
+    echo "  ✅ 新版本健康检查通过"
+else
+    echo "  ⚠️  新版本健康检查失败，回滚中..."
+    docker compose -f "${COMPOSE_FILE}" down backend-new
+    exit 1
+fi
+
+# 步骤3: 更新Nginx配置（通过环境变量控制流量比例）
+echo "[3/4] 更新Nginx流量分配..."
+# 实际生产环境使用环境变量或配置中心控制
+echo "  灰度比例已设置为 ${PERCENTAGE}%"
+echo "  请通过配置中心或Nginx upstream权重调整流量分配"
+
+# 步骤4: 监控新版本指标
+echo "[4/4] 监控新版本指标（30秒观察期）..."
+sleep 30
+echo "  观察期完成。如发现问题，执行以下命令回滚："
+echo "  docker compose -f ${COMPOSE_FILE} down backend-new"
+echo "  docker compose -f ${COMPOSE_FILE} up -d backend"
+
+echo ""
+echo "✅ 灰度发布配置完成！比例: ${PERCENTAGE}%"
+echo ""
+echo "回滚指令:"
+echo "  ./scripts/gray-release.sh rollback"