refactor: remove enqueueUpload from ITelegramService and BotPool

Per-bot queue replaces global upload queue — BotPool handles
queueing internally.

- Remove enqueueUpload method signature from ITelegramService interface
- Remove enqueueUpload method from BotPool class
- Remove import of enqueueUpload from upload-queue module
- Refactor forwardToStorage to call executeWithBotRetry directly
  instead of wrapping via enqueueUpload
- Fix trailing blank lines flagged by Biome formatter

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/domain/ports/telegram-service.ts

@@ -50,15 +50,4 @@ export interface ITelegramService {
    * @returns Metadata including size, MIME type, download path, and bot token.
    */
   getFileInfo(telegramFileId: string): Promise<TelegramFileInfo>;
-
-  /**
-   * Enqueue a task for sequential upload execution.
-   *
-   * Ensures only one Telegram upload runs at a time to avoid
-   * rate limits and resource contention.
-   *
-   * @param task - An async function performing the upload.
-   * @returns The result of the task.
-   */
-  enqueueUpload<T>(task: () => Promise<T>): Promise<T>;
 }

src/infrastructure/telegram/bot-pool.ts

@@ -13,7 +13,6 @@ import {
   sendMethodMap,
   type TelegramMessageResult,
 } from './types';
-import { enqueueUpload } from './upload-queue';
 
 /**
  * Sleep for a given number of milliseconds.
@@ -179,8 +178,7 @@ export class BotPool implements ITelegramService {
   /**
    * Forward a file chunk to the configured Telegram storage chat.
    *
-   * The upload is queued (via {@link enqueueUpload}) and executed with
-   * automatic bot rotation on rate-limit errors.
+   * The upload is executed with automatic bot rotation on rate-limit errors.
    *
    * @param fileChunk - The file data (ReadStream, Buffer, or file path).
    * @param fileName - The original file name.
@@ -198,15 +196,13 @@ export class BotPool implements ITelegramService {
     while (attempt <= MAX_TRANSIENT_RETRIES) {
       attempt++;
       try {
-        const result = await this.enqueueUpload<TelegramMessageResult>(async () => {
-          const filePayload = { source: fileChunk, filename: fileName };
-          const sendMethodName = sendMethodMap[fileType] || 'sendDocument';
-          const payload = buildSendPayload(fileType, fileName);
+        const filePayload = { source: fileChunk, filename: fileName };
+        const sendMethodName = sendMethodMap[fileType] || 'sendDocument';
+        const payload = buildSendPayload(fileType, fileName);
 
-          return this.executeWithBotRetry<TelegramMessageResult>((activeBot) => {
-            const telegram = activeBot.telegram as unknown as Record<string, SendMethod>;
-            return telegram[sendMethodName](config.storageChatId, filePayload, payload);
-          });
+        const result = await this.executeWithBotRetry<TelegramMessageResult>((activeBot) => {
+          const telegram = activeBot.telegram as unknown as Record<string, SendMethod>;
+          return telegram[sendMethodName](config.storageChatId, filePayload, payload);
         });
 
         const uploadedFile = extractUploadedFile(result, fileType);
@@ -302,19 +298,6 @@ export class BotPool implements ITelegramService {
     });
     throw lastError;
   }
-
-  /**
-   * Enqueue a task for sequential upload execution.
-   *
-   * Delegates to the shared upload queue to ensure only a limited number
-   * of Telegram uploads run concurrently.
-   *
-   * @param task - An async function performing the upload.
-   * @returns The result of the task.
-   */
-  enqueueUpload<T>(task: () => Promise<T>): Promise<T> {
-    return enqueueUpload(task);
-  }
 }
 
 /**