Replaced string-based entity identifiers in CRUD procedure and command classes with a strongly-typed EntityType enum. Updated all relevant handlers and records to use the new enum property, improving type safety and maintainability. Added necessary using directives and updated documentation comments to reflect these changes.
Renamed Insert/Update/DeleteEndpointProcedure classes to their
respective Command counterparts to follow CQRS conventions.
Updated controller actions, handlers, InsertObjectProcedure,
and related unit tests to use the new Command types.
No functional changes were made; this is a naming refactor.
