ASP.NET Core 6, Azure Cosmos DB .NET SDK v3 for SQL API, and General Refactoring

• Upgraded to ASP.NET Core 6.0.0
• Refactored to use Azure Cosmos DB .NET SDK v3 for SQL API
• Dropped HeadMethodMiddleware as it no longer works with endpoint routing
• Refactored conditional requests validators to utilize _etag and _ts from Azure Cosmos DB
• Introduced usage of IAsyncEnumerable
• Refactored from "by layer" organization to more "by feature" organization

Handling conditional requests in ASP.NET Core MVC

https://www.tpeczek.com/2017/11/handling-conditional-requests-in-aspnet.html

Exploring HEAD method behavior in ASP.NET Core

https://www.tpeczek.com/2017/10/exploring-head-method-behavior-in.html