Revert "Made Entity.Id private init."

This reverts commit 8d46796.

Author: Timovzl

DomainModeling/DomainModeling.csproj

@@ -74,7 +74,6 @@ Misc:
 - Fix: Fixed bug where DummyBuilder generator struggled with nested types.
 - Fix: Fixed bug where "no source generation on nested type" warning would not show.
 - Enhancement: CompilerGeneratedAttribute throughout.
-- Enhancement: Entity.Id has private init.
 - Enhancement: DebuggerDisplay for Wrappers/Identities.
 - Enhancement: Analyzer warning clarity.
 - Enhancement: Improved correctness of trimming.

DomainModeling/Entity.cs

@@ -81,7 +81,7 @@ public abstract class Entity<
 	/// <summary>
 	/// The entity's unique identity.
 	/// </summary>
-	public TId Id { get; private init; }
+	public TId Id { get; }
 
 	/// <param name="id">The unique identity for the entity.</param>
 	protected Entity(TId id)