feat: implement multi-bot support for Telegram API with rate limit handling and add task queue for uploads

src/env.ts

@@ -2,6 +2,7 @@ import logger from './utils/logger';
 
 interface AppConfig {
   botToken: string;
+  additionalBotTokens: string[];
   storageChatId: number;
   baseUrl: string;
   databaseUrl: string;
@@ -31,6 +32,12 @@ if (missing.length > 0) {
 
 export const config: AppConfig = {
   botToken: process.env.BOT_TOKEN!,
+  additionalBotTokens: process.env.NODE_ENV === 'test'
+    ? []
+    : (process.env.ADDITIONAL_BOT_TOKENS || '')
+        .split(',')
+        .map((t) => t.trim())
+        .filter((t) => t !== ''),
   storageChatId: parseInt(process.env.STORAGE_CHANNEL_ID!, 10),
   baseUrl: process.env.BASE_URL!,
   databaseUrl: process.env.DATABASE_URL!,