Fix unordered server endpoint validation - #4029

Call System.IDisposable.Dispose on object created by 'new Subscription(session.DefaultSubscription)' before all references to it are out of scope (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2000)

Call System.IDisposable.Dispose on object created by 'new Subscription(session.DefaultSubscription)' before all references to it are out of scope (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2000)

Call System.IDisposable.Dispose on object created by 'new Subscription(session.DefaultSubscription)' before all references to it are out of scope (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2000)

Call System.IDisposable.Dispose on object created by 'new Subscription(session.DefaultSubscription)' before all references to it are out of scope (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2000)

Call System.IDisposable.Dispose on object created by 'new Subscription(session.DefaultSubscription)' before all references to it are out of scope (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2000)

Call System.IDisposable.Dispose on object created by 'new Subscription(session.DefaultSubscription)' before all references to it are out of scope (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2000)

Call System.IDisposable.Dispose on object created by 'new Subscription(session.DefaultSubscription)' before all references to it are out of scope (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2000)

Call System.IDisposable.Dispose on object created by 'new Subscription(session.DefaultSubscription)' before all references to it are out of scope (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2000)

Call System.IDisposable.Dispose on object created by 'new Subscription(session.DefaultSubscription)' before all references to it are out of scope (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2000)