❔ IHealthCheck and Swagger

[Route("api/[controller]")]
[ApiController]
public class PostalController : ControllerBase, IHealthCheck
{
  //...
  public Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context, CancellationToken cancellationToken = default)
  {
    var isHealthy = true;

    // ...

    if (isHealthy) 
    {
        return Task.FromResult(HealthCheckResult.Healthy());
    }

    return Task.FromResult(
        new HealthCheckResult(context.Registration.FailureStatus));
  }
}    

builder.Services.AddHealthChecks().AddCheck<PostalController>("Postal Health Check");

//...
app.MapHealthChecks("/healthz", new Microsoft.AspNetCore.Diagnostics.HealthChecks.HealthCheckOptions 
{ 
    AllowCachingResponses = false,
    ResultStatusCodes =
    {
        [HealthStatus.Healthy] = StatusCodes.Status200OK,
        [HealthStatus.Degraded] = StatusCodes.Status200OK,
        [HealthStatus.Unhealthy] = StatusCodes.Status503ServiceUnavailable
    }
});