changed the chunk size to 1 mb

internal/utils/reader.go

@@ -51,7 +51,7 @@ func NewTelegramReader(
 		client:        client,
 		start:         start,
 		end:           end,
-		chunkSize:     int64(4 * 1024 * 1024), // 4 MB chunk size
+		chunkSize:     int64(1024 * 1024), // 4 MB chunk size
 		contentLength: contentLength,
 		maxRetries:    5, // Allow up to 5 retries for any chunk failure
 	}