Add missing fields

[denislavstanchev]

Pull Request

Summary

• Added the missing resourceType field to the sheet, report, template, folder and sight models
• Added missing created_at, modified_at and permalink fields to the template model
• Added a ChildResourceType enum
• Updated tests

Checklist

• Read the contribution guide
• Successfully build your changes locally - Run ./gradlew clean build
• Include a title that clearly describes your changes and references relevant issues / backlog items
• Include a summary of your changes
• Include tests for your changes where possible

[ggyurchev]

changelog missing and failing tests