更新依赖项，添加 flowme 插入触发器和监听器；重构数据库连接管理；优化用户路由和 SSE 处理

src/db/drizzle/schema.ts

@@ -523,6 +523,7 @@ export const flowmeChannels = pgTable("flowme_channels", {
   id: uuid().primaryKey().notNull().defaultRandom(),
   uid: uuid(),
   title: text('title').default(''),
+  key: text('key').default(''),
   description: text('description').default(''),
   tags: jsonb().default([]),
   link: text('link').default(''),
@@ -532,5 +533,6 @@ export const flowmeChannels = pgTable("flowme_channels", {
   updatedAt: timestamp('updatedAt').notNull().defaultNow(),
 }, (table) => [
   index('flowme_channels_uid_idx').using('btree', table.uid.asc().nullsLast()),
+  index('flowme_channels_key_idx').using('btree', table.key.asc().nullsLast()),
   index('flowme_channels_title_idx').using('btree', table.title.asc().nullsLast()),
 ]);