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

test/telegramQueue.test.ts

@@ -0,0 +1,39 @@
+import { describe, expect, it } from 'bun:test';
+import { enqueueUpload } from '../src/utils/telegramQueue';
+
+describe('Telegram Queue', () => {
+  it('should process tasks in order and limit concurrency', async () => {
+    let activeTasks = 0;
+    let maxActiveTasks = 0;
+    const executionOrder: number[] = [];
+
+    const createTask = (id: number, delayMs: number) => {
+      return async () => {
+        activeTasks++;
+        if (activeTasks > maxActiveTasks) {
+          maxActiveTasks = activeTasks;
+        }
+
+        await new Promise((resolve) => setTimeout(resolve, delayMs));
+
+        executionOrder.push(id);
+        activeTasks--;
+        return id;
+      };
+    };
+
+    // Enqueue 4 tasks with delays
+    const promises = [
+      enqueueUpload(createTask(1, 50)),
+      enqueueUpload(createTask(2, 20)),
+      enqueueUpload(createTask(3, 10)),
+      enqueueUpload(createTask(4, 5)),
+    ];
+
+    const results = await Promise.all(promises);
+
+    expect(results).toEqual([1, 2, 3, 4]);
+    // Concurrency limit is 2, so maximum active tasks at any time should be <= 2
+    expect(maxActiveTasks).toBeLessThanOrEqual(2);
+  });
+});