chore(tests): limpia warning xUnit2012 en CreateUsuario_WithInactiveRol_Returns400

Reemplaza Assert.True(enumerable.Any(...)) por Assert.Contains idiomatico.

tests/SIGCM2.Api.Tests/Usuarios/CreateUsuarioEndpointTests.cs

@@ -421,7 +421,7 @@ public sealed class CreateUsuarioEndpointTests : IAsyncLifetime
             var json = await resp.Content.ReadFromJsonAsync<JsonElement>();
             Assert.True(json.TryGetProperty("errors", out var errors), "Response must contain 'errors'");
             // Validation error should be on the Rol field
-            Assert.True(errors.EnumerateObject().Any(p => p.Name.Equals("Rol", StringComparison.OrdinalIgnoreCase)));
+            Assert.Contains(errors.EnumerateObject(), p => p.Name.Equals("Rol", StringComparison.OrdinalIgnoreCase));
         }
         finally
         {