chore(az.sb): deprecate public message router types (#641)

Author: stijnmoreels

src/Arcus.Messaging.Abstractions.ServiceBus/MessageHandling/AzureServiceBusMessageRouter.cs

@@ -12,11 +12,14 @@
 using Serilog.Context;
 using static Arcus.Messaging.Abstractions.MessageHandling.MessageProcessingError;
 
+#pragma warning disable S1133
+
 namespace Arcus.Messaging.Abstractions.ServiceBus.MessageHandling
 {
     /// <summary>
     /// Represents an <see cref="IAzureServiceBusMessageRouter"/> that can route Azure Service Bus <see cref="ServiceBusReceivedMessage"/>s.
     /// </summary>
+    [Obsolete("Will be removed in v4.0 as the message router is being made internal")]
     public class AzureServiceBusMessageRouter : MessageRouter, IAzureServiceBusMessageRouter
     {
         /// <summary>

src/Arcus.Messaging.Abstractions.ServiceBus/MessageHandling/AzureServiceBusMessageRouterOptions.cs

@@ -3,7 +3,7 @@
 namespace Arcus.Messaging.Abstractions.ServiceBus.MessageHandling
 {
     /// <summary>
-    /// Represents the consumer-configurable options to change the behavior of the <see cref="AzureServiceBusMessageRouter"/>.
+    /// Represents the consumer-configurable options to change the behavior of the message router in an Azure Service Bus message pump.
     /// </summary>
     public class AzureServiceBusMessageRouterOptions : MessageRouterOptions
     {

src/Arcus.Messaging.Abstractions.ServiceBus/MessageHandling/IAzureServiceBusMessageRouter.cs

@@ -9,6 +9,9 @@ namespace Arcus.Messaging.Abstractions.ServiceBus.MessageHandling
     /// <summary>
     /// Represents an instance that can route Azure Service Bus <see cref="ServiceBusReceivedMessage"/>s through registered <see cref="IAzureServiceBusMessageHandler{TMessage}"/>s.
     /// </summary>
+#pragma warning disable S1133
+    [Obsolete("Will be removed in v4.0 as the message router is being made internal")]
+#pragma warning restore S1133
     public interface IAzureServiceBusMessageRouter
     {
         /// <summary>