Decouple UserType, add Role entity and management

Removed all UserType logic and references, replacing them with a new Role model and management system. Introduced RoleManager service, repository, and API endpoint for role CRUD operations. Updated user flows and JWT claims to use RoleCode. Removed admin-only user CRUD endpoints. Updated DI, documentation, and error handling for consistency. Appsettings and DTOs now reflect the new role-based approach.

Repos/RoleManageRepository.cs

@@ -0,0 +1,43 @@
+using AuthHex.Interfaces;
+using AuthHex.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace AuthHex.Repos
+{
+    public class RoleManageRepository : IRoleManageRepository
+    {
+        private readonly AppDBContext _dbContext;
+
+        public RoleManageRepository(AppDBContext dbContext)
+        {
+            _dbContext = dbContext;
+        }
+
+        public Task<Role> AddRoleAsync(Role role, CancellationToken ct = default)
+        {
+            _dbContext.Roles.Add(role);
+            return Task.FromResult(role);
+        }
+
+        public async Task<Role?> GetRoleByIdAsync(Guid roleId, CancellationToken ct = default)
+        {
+            return await _dbContext.Roles.FirstOrDefaultAsync(r => r.RoleId == roleId, ct);
+        }
+
+        public async Task<List<Role>> ListRolesAsync(CancellationToken ct = default)
+        {
+            return await _dbContext.Roles.OrderBy(r => r.Code).ToListAsync(ct);
+        }
+
+        //public async Task<bool> RoleInUseAsync(Guid roleId, CancellationToken ct = default)
+        //{
+        //    return await _dbContext.Users.AnyAsync(u => u.RoleId == roleId, ct);
+        //}
+
+        public Task DeleteRoleAsync(Role role, CancellationToken ct = default)
+        {
+            _dbContext.Roles.Remove(role);
+            return Task.CompletedTask;
+        }
+    }
+}

Repos/UserManageRepository.cs

@@ -43,9 +43,8 @@ namespace AuthHex.Repos
         }
 
 
-        public async Task<User?> GetUserByIdentifierAndType(string identifier, Guid? userTypeId)
+        public async Task<User?> GetUserByIdentifierAndType(string identifier)
         {
-
             User? user = await _dbContext.Users
                 .FirstOrDefaultAsync(u =>
                     u.Email == identifier ||
@@ -70,7 +69,6 @@ namespace AuthHex.Repos
         public async Task<User?> GetUserByIdAsync(Guid userId, CancellationToken ct = default)
         {
             return await _dbContext.Users
-                .Include(u => u.UserType)
                 .FirstOrDefaultAsync(u => u.Id == userId, ct);
         }