Added the ERI specification (aka version) to the common ERI interface

app/MindWork AI Studio/Settings/DataModel/DataSourceERI_V1.cs

@@ -1,5 +1,6 @@
 // ReSharper disable InconsistentNaming
 
+using AIStudio.Assistants.ERI;
 using AIStudio.Tools.ERIClient.DataModel;
 
 namespace AIStudio.Settings.DataModel;
@@ -39,4 +40,7 @@ public readonly record struct DataSourceERI_V1 : IERIDataSource
 
     /// <inheritdoc />
     public DataSourceSecurity SecurityPolicy { get; init; } = DataSourceSecurity.NOT_SPECIFIED;
+    
+    /// <inheritdoc />
+    public ERIVersion Version { get; init; } = ERIVersion.V1;
 }

app/MindWork AI Studio/Settings/IERIDataSource.cs

@@ -1,3 +1,4 @@
+using AIStudio.Assistants.ERI;
 using AIStudio.Tools.ERIClient.DataModel;
 
 namespace AIStudio.Settings;
@@ -23,4 +24,9 @@ public interface IERIDataSource : IExternalDataSource
     /// The username to use for authentication, when the auth. method is USERNAME_PASSWORD.
     /// </summary>
     public string Username { get; init; }
+    
+    /// <summary>
+    /// The ERI specification to use.
+    /// </summary>
+    public ERIVersion Version { get; init; }
 }