refactor: Ensure proper handling of empty responses in Discord API request

src/lib/discordRateLimiter.ts

@@ -45,6 +45,9 @@ export class DiscordRateLimiter {
       throw new Error(`Discord API error: ${response.status} - ${errorData.message || JSON.stringify(errorData)}`);
     }
 
+    if (response.status === 204 || response.headers.get('Content-Length') === '0') {
+      return undefined as T; 
+    }
     return response.json() as Promise<T>;
   }
 }