feat: enhance DTO mock generation with dynamic import paths and mock value checks

templates/model-entity.spec.mustache

@@ -11,6 +11,7 @@ describe('{{classname}}', () => {
   });
 
 {{#vars}}
+{{#hasMockValue}}
   it('should allow setting {{name}}', () => {
     const model = new {{classname}}();
     const expected = mock{{classname}}Model();
@@ -19,13 +20,16 @@ describe('{{classname}}', () => {
     expect(model.{{name}}).toBe(expected.{{name}});
   });
 
+{{/hasMockValue}}
 {{/vars}}
   it('should build a valid model from mock', () => {
     const model = mock{{classname}}Model();
 
     expect(model).toBeInstanceOf({{classname}});
 {{#vars}}
+{{#hasMockValue}}
     expect(model.{{name}}).toBeDefined();
+{{/hasMockValue}}
 {{/vars}}
   });
 });