docs: 移动蓝绿部署指南到 troubleshooting 目录

backend/migrations/versions/001_add_reminder_fields.sql

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+-- =============================================================================
+-- 企微IT智能服务台 — 数据库迁移脚本
+-- =============================================================================
+-- 说明：为 conversations 表添加超时提醒相关字段
+-- 执行时机：在部署 MSG-P2-02 功能前执行
+-- 兼容性：PostgreSQL
+-- =============================================================================
+
+-- 添加超时提醒相关字段
+ALTER TABLE conversations
+ADD COLUMN IF NOT EXISTS last_agent_reply_at TIMESTAMP WITH TIME ZONE DEFAULT NULL,
+ADD COLUMN IF NOT EXISTS reminder_sent BOOLEAN DEFAULT FALSE NOT NULL,
+ADD COLUMN IF NOT EXISTS reminder_sent_at TIMESTAMP WITH TIME ZONE DEFAULT NULL,
+ADD COLUMN IF NOT EXISTS pending_close_at TIMESTAMP WITH TIME ZONE DEFAULT NULL;
+
+-- 添加索引以优化查询性能
+CREATE INDEX IF NOT EXISTS idx_conversations_last_agent_reply_at
+ON conversations(last_agent_reply_at)
+WHERE last_agent_reply_at IS NOT NULL;
+
+CREATE INDEX IF NOT EXISTS idx_conversations_reminder_sent
+ON conversations(reminder_sent)
+WHERE reminder_sent = FALSE;
+
+CREATE INDEX IF NOT EXISTS idx_conversations_pending_close_at
+ON conversations(pending_close_at)
+WHERE pending_close_at IS NOT NULL;
+
+-- 回滚脚本（如果需要回滚）
+-- ALTER TABLE conversations
+-- DROP COLUMN IF EXISTS last_agent_reply_at,
+-- DROP COLUMN IF EXISTS reminder_sent,
+-- DROP COLUMN IF EXISTS reminder_sent_at,
+-- DROP COLUMN IF EXISTS pending_close_at;
+--
+-- DROP INDEX IF EXISTS idx_conversations_last_agent_reply_at;
+-- DROP INDEX IF EXISTS idx_conversations_reminder_sent;
+-- DROP INDEX IF EXISTS idx_conversations_pending_close_at;