feat(reliability): close messaging gateway P0 gaps

telegram-gateway/src/database/entities/tg-chat.entity.ts

@@ -6,6 +6,7 @@ import {
   UpdateDateColumn,
   ManyToOne,
   JoinColumn,
+  Index,
 } from 'typeorm';
 import { TgAccount } from './tg-account.entity';
 
@@ -18,6 +19,7 @@ export enum ChatType {
 }
 
 @Entity('tg_chats')
+@Index('IDX_tg_chat_account_identity', ['accountId', 'tgChatId'], { unique: true })
 export class TgChat {
   @PrimaryGeneratedColumn('uuid')
   id: string;

telegram-gateway/src/database/migrations/1700000003000-TgChatIdentityUnique.ts

@@ -0,0 +1,36 @@
+import { MigrationInterface, QueryRunner, TableIndex } from 'typeorm';
+
+export class TgChatIdentityUnique1700000003000 implements MigrationInterface {
+  name = 'TgChatIdentityUnique1700000003000';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      DELETE FROM tg_chats older
+      USING tg_chats newer
+      WHERE older."accountId" = newer."accountId"
+        AND older."tgChatId" = newer."tgChatId"
+        AND (
+          older."updatedAt" < newer."updatedAt"
+          OR (older."updatedAt" = newer."updatedAt" AND older.id < newer.id)
+        )
+    `);
+    const table = await queryRunner.getTable('tg_chats');
+    if (!table?.indices.some((index) => index.name === 'IDX_tg_chat_account_identity')) {
+      await queryRunner.createIndex(
+        'tg_chats',
+        new TableIndex({
+          name: 'IDX_tg_chat_account_identity',
+          columnNames: ['accountId', 'tgChatId'],
+          isUnique: true,
+        }),
+      );
+    }
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    const table = await queryRunner.getTable('tg_chats');
+    if (table?.indices.some((index) => index.name === 'IDX_tg_chat_account_identity')) {
+      await queryRunner.dropIndex('tg_chats', 'IDX_tg_chat_account_identity');
+    }
+  }
+}