Validate logger presence for LogSuccessfulRequests

Added a validation in the `ReCClient` constructor to ensure that
an `ILogger` instance is provided when the `LogSuccessfulRequests`
option in `ReCClientOptions` is enabled. Throws an
`InvalidOperationException` with a detailed message if no logger
is injected. The message includes guidance on resolving the issue
by either registering a logging provider or disabling the option.

src/ReC.Client/ReCClient.cs

@@ -68,6 +68,13 @@ namespace ReC.Client
         {
             _http = httpClientFactory.CreateClient(ClientName);
             var opts = options?.Value ?? new ReCClientOptions();
+
+            if (opts.LogSuccessfulRequests && logger == null)
+                throw new InvalidOperationException(
+                    $"{nameof(ReCClientOptions.LogSuccessfulRequests)} is enabled, but no {nameof(ILogger)} was injected into {nameof(ReCClient)}. " +
+                    $"Register a logging provider (e.g. services.AddLogging()) so that an {nameof(ILogger)} can be resolved, " +
+                    $"or set {nameof(ReCClientOptions.LogSuccessfulRequests)} to false.");
+
             RecActions = new RecActionApi(_http, logger, opts);
             Results = new ResultApi(_http, logger, opts);
             Profiles = new ProfileApi(_http, logger, opts);