[atdml] Drop to_primitive accessors; coerce with :> instead Remove the generated 'score_to_float' / 'id_to_string' functions and their submodule counterparts ('val to_float', 'val to_string'). Coercion back to the primitive type is trivially done with the ':>' operator (e.g. '(x :> string)') and doesn't need a generated helper. Keep 'create_score' / 'val create' as the constructor. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>