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

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

* refactor: create attachment table via migration

server/src/infra/migrations/1702084989965-AddWebSocketAttachmentTable.ts

@@ -0,0 +1,13 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class AddWebSocketAttachmentTable1702084989965 implements MigrationInterface {
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      'CREATE TABLE IF NOT EXISTS "socket_io_attachments" (id bigserial UNIQUE, created_at timestamptz DEFAULT NOW(), payload bytea);',
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`DROP TABLE "socket_io_attachments"`);
+  }
+}