Optimize short circuit when there are no project changes

Though the service itself doesn't have heavy logic in this case,
the ProjectUpdatedEvent is still fired.
And this has heavy logic.

Author: CarsonF

src/components/project/project.service.ts

@@ -286,6 +286,9 @@ export class ProjectService {
     this.privileges
       .for(session, resolveProjectType(currentProject), currentProject)
       .verifyChanges(changes, { pathPrefix: 'project' });
+    if (!changedStep && Object.keys(changes).length === 0) {
+      return await this.readOneUnsecured(input.id, session, changeset);
+    }
 
     let updated = currentProject;
     if (changedStep) {