feat: Add RestTemplate bean to OpenRouterConfig

src/main/java/ru/cathub/telegabot/configuration/OpenRouterConfig.java

@@ -15,6 +15,11 @@ public class OpenRouterConfig {
     private String url;
     private String model;
 
+    @Bean
+    public RestTemplate restTemplate() {
+        return new RestTemplate();
+    }
+
     public String getKey() {
         return key;
     }