chore: drop nullable annotations outside a nullable context (CS8632)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: bielu

src/ByteBard.AsyncAPI.Bindings/Sns/Statement.cs

@@ -26,7 +26,7 @@ public class Statement : IAsyncApiExtensible
         /// <summary>
         /// The resource(s) that this policy applies to.
         /// </summary>
-        public StringOrStringList? Resource { get; set; }
+        public StringOrStringList Resource { get; set; }
 
         /// <summary>
         /// Specific circumstances under which the policy grants permission.

src/ByteBard.AsyncAPI.Bindings/Sqs/Statement.cs

@@ -26,7 +26,7 @@ public class Statement : IAsyncApiExtensible
         /// <summary>
         /// The resource(s) that this policy applies to.
         /// </summary>
-        public StringOrStringList? Resource { get; set; }
+        public StringOrStringList Resource { get; set; }
 
         /// <summary>
         /// Specific circumstances under which the policy grants permission.

src/ByteBard.AsyncAPI.Readers/AsyncApiReaderSettings.cs

@@ -73,7 +73,7 @@ public ICollection<IBindingParser<IBinding>>
         /// <summary>
         /// Uri where relative references should be resolved from when using the External Reference Loader.
         /// </summary>
-        public Uri? BaseUri { get; set; }
+        public Uri BaseUri { get; set; }
 
         /// <summary>
         /// External reference reader implementation provided by users for reading external resources.

src/ByteBard.AsyncAPI/Models/AsyncApiChannel.cs

@@ -15,7 +15,7 @@ public class AsyncApiChannel : IAsyncApiSerializable, IAsyncApiExtensible
         /// <summary>
         /// An optional string representation of this channel's address. The address is typically the "topic name", "routing key", "event type", or "path". When null or absent, it MUST be interpreted as unknown. This is useful when the address is generated dynamically at runtime or can't be known upfront. It MAY contain Channel Address Expressions. Query parameters and fragments SHALL NOT be used, instead use bindings to define them.
         /// </summary>
-        public virtual string? Address { get; set; }
+        public virtual string Address { get; set; }
 
         /// <summary>
         /// A map of the messages that will be sent to this channel by any application at any time. Every message sent to this channel MUST be valid against one, and only one, of the message objects defined in this map.