feat(server): use postgres-adapter for websockets (#5569)

* feat(server): use postgres-adapter for websockets

* refactor: create attachment table via migration

server/src/infra/websocket.adapter.ts

@@ -0,0 +1,19 @@
+import { INestApplicationContext } from '@nestjs/common';
+import { IoAdapter } from '@nestjs/platform-socket.io';
+import { createAdapter } from '@socket.io/postgres-adapter';
+import { ServerOptions } from 'socket.io';
+import { DataSource } from 'typeorm';
+import { PostgresDriver } from 'typeorm/driver/postgres/PostgresDriver.js';
+
+export class WebSocketAdapter extends IoAdapter {
+  constructor(private app: INestApplicationContext) {
+    super(app);
+  }
+
+  createIOServer(port: number, options?: ServerOptions): any {
+    const server = super.createIOServer(port, options);
+    const pool = (this.app.get(DataSource).driver as PostgresDriver).master;
+    server.adapter(createAdapter(pool));
+    return server;
+  }
+}