Refactor variable names for clarity in response handling

Renamed variables `body` to `resBody` and `headers` to `resHeaders`
to improve clarity and better reflect their association with the
response object. These changes enhance code readability and
maintainability without altering functionality.

src/ReC.Application/RecActions/Commands/InvokeRecActionCommand.cs

@@ -51,7 +51,7 @@ public class InvokeRecActionCommandHandler(
                 httpReq.Headers.Add(header.Key, header.Value);
 
         using var response = await http.SendAsync(httpReq, cancel);
-        var body = await response.Content.ReadAsStringAsync(cancel);
+        var resBody = await response.Content.ReadAsStringAsync(cancel);
-        var headers = response.Headers.ToDictionary();
+        var resHeaders = response.Headers.ToDictionary();
     }
 }