Entity Type
A declared, animatable entity type (Phase 10.1a).
EntityType is a no-behavior ModelElement whose name is the simple class name of a ProcessModel.Entity subclass — exactly the label the engine emits in EntityCreated.entityType. Declaring one surfaces the type to the animation inventory (editor pick-lists + author-time validation) before any run, without affecting the simulation. Because it is a ModelElement, it flows through Model.getModelElements() like every other animatable element, so the inventory and capture machinery find it with no special-casing.
Create instances with entityType rather than calling the constructor directly, so the name is derived from the type and matches the trace by construction.