feat: sync langpack and auth updates

Sync telesrv commits 49f9bab and 04d9563 into the public mirror. Exclude private docs and runtime key material per sync rules.

data/langpack/ios/ios_en_v21495337.strings

@@ -3231,7 +3231,7 @@
 "ChatbotSetup.BotNotFoundStatus" = "Chatbot not found";
 "ChatbotSetup.BotSearchPlaceholder" = "Bot Username or Link";
 "ChatbotSetup.BotSectionFooter" = "Choose a bot to manage your chats automatically.";
-"ChatbotSetup.ErrorBotNotBusinessCapable" = "This bot doesn't support Telegram Business yet.";
+"ChatbotSetup.ErrorBotNotBusinessCapable" = "This bot doesn't support Secretary Mode yet.";
 "ChatbotSetup.Gift.Warning.CombinedText" = "The bot **%@** will be able to **manage your gifts and stars**, including giving them away to other users.";
 "ChatbotSetup.Gift.Warning.GiftsText" = "The bot **%@** will be able to **manage your gifts**, including giving them away to other users.";
 "ChatbotSetup.Gift.Warning.Proceed" = "Proceed";