Loki Url is not validated on bootstrap

[frsavard]

Which version of Serilog.Sinks.Grafana.Loki are you using?

v8.3.0

Which version of .NET are you using?

net8.0

Describe the bug

While trying to find out why I couldn't see anything in grafana, I deliberately put an invalid uri in WriteTo.GrafanaLoki(). Nothing happens, everything moves forward as if nothing had happened.

To Reproduce

using Serilog;
using Serilog.Sinks.Grafana.Loki;
using ILogger = Serilog.Core.Logger;

public static class Program
{
    public static async Task Main(string[] args)
    {
        ILogger logger = new LoggerConfiguration()
            .WriteTo.Console()
            //.WriteTo.GrafanaLoki("http://localhost:3100") // does not work
            .WriteTo.GrafanaLoki("this is not a valid uri") // should have reported an issue!!
            .CreateLogger();

        logger.Information("Starting web host"); // it logs on the console but not in Loki

Expected behavior

It should have reported the issue, either logging it or throw an exception.

Log/SelfLog output or exception with stacktrace

No output, no exception, this is the problem.

Application or code sample, which could be used to reproduce a bug

No response

Additional context

using Serilog;
using Serilog.Sinks.Grafana.Loki;
using ILogger = Serilog.Core.Logger;

public static class Program
{
    public static async Task Main(string[] args)
    {
        ILogger logger = new LoggerConfiguration()
            .WriteTo.Console()
            //.WriteTo.GrafanaLoki("http://localhost:3100") // does not work
            .WriteTo.GrafanaLoki("this is not a valid uri") // should have reported an issue!!
            .CreateLogger();

        logger.Information("Starting web host"); // it logs on the console but not in Loki

I have read the documentation

• [X] I have read Common Problems section in project wiki