fix: apply command to SurrealDbContainerFixture

Author: Odonno

tests/CommunityToolkit.Aspire.SurrealDb.Tests/SurrealDbContainerFixture.cs

@@ -53,6 +53,7 @@ public async Task InitializeAsync()
                 .WithWaitStrategy(Wait.ForUnixContainer().UntilHttpRequestIsSucceeded(r => r.ForPort(_port)))
                 .WithEnvironment("SURREAL_USER", _username)
                 .WithEnvironment("SURREAL_PASS", _password)
+                .WithCommand("start", "memory")
                 .Build();
 
             await Container.StartAsync();