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>

TeleBot/TeleBot/appsettings.json

@@ -20,7 +20,7 @@
     "Comment": "Optional secret key for webhook authentication"
   },
   "LittleShop": {
-    "ApiUrl": "http://littleshop:5000",
+    "ApiUrl": "http://localhost:5000",
     "OnionUrl": "",
     "Username": "admin",
     "Password": "admin",
@@ -34,7 +34,7 @@
     "EnableAnalytics": false,
     "RequirePGPForShipping": false,
     "EphemeralByDefault": true,
-    "EnableTor": true,
+    "EnableTor": false,
     "TorSocksHost": "tor-gateway",
     "TorSocksPort": 9050,
     "TorControlPort": 9051,