fix: Bot registration duplicate prevention and SilverPay integration update

- Fixed BotService to prevent duplicate bot registrations by checking for existing bot with same name/type
- Updated existing bot record instead of creating duplicates on re-registration
- Configured SilverPay integration with production API key
- Updated TeleBot configuration for local development (localhost API URL, Tor disabled)

This ensures single bot instances and proper payment gateway integration for testing.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

LittleShop/Services/BotService.cs

@@ -26,10 +26,41 @@ public class BotService : IBotService
 
     public async Task<BotRegistrationResponseDto> RegisterBotAsync(BotRegistrationDto dto)
     {
-        _logger.LogInformation("Registering new bot: {BotName}", dto.Name);
+        _logger.LogInformation("Registering bot: {BotName} (Type: {BotType})", dto.Name, dto.Type);
 
+        // Check if a bot with the same name and type already exists
+        var existingBot = await _context.Bots
+            .FirstOrDefaultAsync(b => b.Name == dto.Name && b.Type == dto.Type);
+
+        if (existingBot != null)
+        {
+            _logger.LogInformation("Bot already exists: {BotId}. Updating existing bot instead of creating duplicate.", existingBot.Id);
+
+            // Update existing bot
+            existingBot.Description = dto.Description;
+            existingBot.Version = dto.Version;
+            existingBot.Settings = JsonSerializer.Serialize(dto.InitialSettings);
+            existingBot.PersonalityName = string.IsNullOrEmpty(dto.PersonalityName) ? existingBot.PersonalityName : dto.PersonalityName;
+            existingBot.Status = BotStatus.Active;
+            existingBot.IsActive = true;
+            existingBot.LastConfigSyncAt = DateTime.UtcNow;
+
+            await _context.SaveChangesAsync();
+
+            _logger.LogInformation("Existing bot updated: {BotId}", existingBot.Id);
+
+            return new BotRegistrationResponseDto
+            {
+                BotId = existingBot.Id,
+                BotKey = existingBot.BotKey,
+                Name = existingBot.Name,
+                Settings = dto.InitialSettings
+            };
+        }
+
+        // Create new bot if none exists
         var botKey = await GenerateBotKeyAsync();
-        
+
         var bot = new Bot
         {
             Id = Guid.NewGuid(),
@@ -48,7 +79,7 @@ public class BotService : IBotService
         _context.Bots.Add(bot);
         await _context.SaveChangesAsync();
 
-        _logger.LogInformation("Bot registered successfully: {BotId}", bot.Id);
+        _logger.LogInformation("New bot registered successfully: {BotId}", bot.Id);
 
         return new BotRegistrationResponseDto
         {