Update dependencies and integrate EnvelopeGenerator

Updated `DigitalData.Auth.Tests.csproj` to include `Microsoft.EntityFrameworkCore` version `8.0.17`.

Refactored `AuthController.cs` to remove unused imports and update to the latest `DigitalData.Core.Abstraction.Application` namespaces.

Streamlined `DigitalData.Auth.API.csproj`:
- Changed target framework to `net8.0`.
- Upgraded `DigitalData.Core.Abstractions` to `4.3.0` and `DigitalData.Core.Application` to `3.4.0`.
- Added `EnvelopeGenerator` and `Microsoft.EntityFrameworkCore` dependencies.
- Removed outdated `UserManager` dependencies.

Enhanced `Program.cs`:
- Integrated `EnvelopeGenerator` services with database context and caching configuration.
- Removed `AddUserManager` service registration.
- Added SQL Server logging and error handling for `DbContext`.

These changes improve maintainability, adopt modern frameworks, and introduce new functionality with `EnvelopeGenerator`.

src/DigitalData.Auth.API/DigitalData.Auth.API.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net8.0</TargetFrameworks>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <Version>1.3.0</Version>
@@ -11,19 +11,18 @@
 
   <ItemGroup>
     <PackageReference Include="BCrypt.Net-Next" Version="4.0.3" />
-    <PackageReference Include="DigitalData.Core.Abstractions" Version="3.4.0" />
+    <PackageReference Include="DigitalData.Core.Abstractions" Version="4.3.0" />
     <PackageReference Include="DigitalData.Core.Abstractions.Security" Version="1.0.0" />
-    <PackageReference Include="DigitalData.Core.Application" Version="3.2.0" />
+    <PackageReference Include="DigitalData.Core.Application" Version="3.4.0" />
     <PackageReference Include="DigitalData.Core.Security" Version="1.2.2" />
+    <PackageReference Include="EnvelopeGenerator" Version="1.1.0" />
     <PackageReference Include="Microsoft.AspNetCore.SignalR" Version="1.2.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.17" />
     <PackageReference Include="Microsoft.IdentityModel.Tokens" Version="8.3.1" />
     <PackageReference Include="NLog" Version="5.4.0" />
     <PackageReference Include="NLog.Extensions.Logging" Version="5.4.0" />
     <PackageReference Include="NLog.Web.AspNetCore" Version="5.4.0" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="7.2.0" />
-    <PackageReference Include="UserManager.Application" Version="3.1.2" />
-    <PackageReference Include="UserManager.Domain" Version="3.0.1" />
-    <PackageReference Include="UserManager.Infrastructure" Version="3.0.1" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'net7.0'">