Add RegistrationDateTime to users; major codebase cleanup

- Added RegistrationDateTime column to AspNetUsers via EF Core migration to track user registration date/time.
- Removed SecurityService.BusinessLogic, Client, DataTransferObjects, Models, and all test/integration/migration projects and files.
- Refactored logic into database/model layers; updated user models and handlers to support RegistrationDateTime.
- Deleted all UI, test, and migration infrastructure, including IdentityServer UI, Bootstrap/jQuery assets, and related configs.
- Significantly simplified the codebase, focusing on direct model usage and removing legacy layers and dependencies.

Author: StuartFerguson

SecurityService.BusinessLogic/RequestHandlers/UserRequestHandler.cs

@@ -183,6 +183,7 @@ public async Task<Result> Handle(SecurityServiceCommands.CreateUserCommand comma
             MiddleName = command.MiddleName,
             FamilyName = command.FamilyName,
             EmailConfirmed = string.IsNullOrWhiteSpace(command.EmailAddress),
+            RegistrationDateTime = DateTime.Now,
         };
 
         Result<String> passwordValueResult = String.IsNullOrEmpty(command.Password) ? PasswordGenerator.GenerateRandomPassword(this.Options.Value.PasswordOptions) : command.Password;
@@ -350,6 +351,7 @@ private async Task<UserDetails> MapAsync(ApplicationUser user)
             user.GivenName,
             user.MiddleName,
             user.FamilyName,
+            user.RegistrationDateTime,
             claims.GroupBy(claim => claim.Type, StringComparer.OrdinalIgnoreCase).ToDictionary(group => group.Key, group => group.Last().Value, StringComparer.OrdinalIgnoreCase),
             roles.ToArray());
     }

SecurityService.DataTransferObjects/Responses.cs

@@ -163,6 +163,10 @@ public sealed record UserResponse {
     [JsonProperty("roles")]
     [JsonPropertyName("roles")]
     public IReadOnlyCollection<string> Roles { get; set; }
+
+    [JsonProperty("registration_date_time")]
+    [JsonPropertyName("registration_date_time")]
+    public DateTime RegistrationDateTime { get; set; }
 }
 
 public class TokenResponse

SecurityService.Database/ApplicationUser.cs

@@ -9,4 +9,6 @@ public sealed class ApplicationUser : IdentityUser
     public string? MiddleName { get; set; }
 
     public string? FamilyName { get; set; }
+
+    public DateTime RegistrationDateTime { get; set; }
 }

SecurityService.Database/SecurityService.Database.csproj

@@ -13,6 +13,10 @@
     <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="10.0.5" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="10.0.5" />
     <PackageReference Include="OpenIddict.EntityFrameworkCore" Version="7.3.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="10.0.5">
+	    <PrivateAssets>all</PrivateAssets>
+	    <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
   </ItemGroup>
   <ItemGroup>
 

SecurityService.Models/DetailsModels.cs

@@ -46,6 +46,7 @@ public sealed record UserDetails(
     string? GivenName,
     string? MiddleName,
     string? FamilyName,
+    DateTime RegistrationDateTime,
     IReadOnlyDictionary<string, string> Claims,
     IReadOnlyCollection<string> Roles);