V4.0.0 Preview 2

This preview release incorporates a set of pull requests merged during the public preview period, notably:

• #145
• #147
• #155
• #159
• #167
• #176

It is also the first release published under our recently added GitHub Actions CI workflows, and if things go smoothly, it will autogenerate a nuget package available through https://www.nuget.org/profiles/RealEstateCore

Full release notes including the above and any additional changes will be published when REC 4 reaches GA, still targeted for the fall period.