Refactor logging messages for consistency and clarity

- Updated various logging messages across the application to replace Russian text with English equivalents, ensuring consistency in error and information logs.
- Enhanced clarity in log messages related to Telegram bot operations, user management commands, and health check services, improving overall traceability and understanding of application behavior.

backend/src/PnvPanel.Api/Telegram/TelegramBotHostedService.cs

@@ -21,7 +21,7 @@ public sealed class TelegramBotHostedService(
     {
         if (string.IsNullOrWhiteSpace(options.Value.BotToken))
         {
-            logger.LogWarning("Telegram__BotToken не задан — бот не стартует.");
+            logger.LogWarning("Telegram__BotToken is not set — bot will not start.");
             return;
         }
 
@@ -31,7 +31,7 @@ public sealed class TelegramBotHostedService(
             DropPendingUpdates = true,
         };
 
-        logger.LogInformation("Telegram-бот запускается (long polling)...");
+        logger.LogInformation("Telegram bot starting (long polling)...");
 
         try
         {