Create models and Clean Arch boilerplate

CSR.Infrastructure/Persistence/Repositories/RoleRepository.cs

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+namespace Csr.Infrastructure.Persistence.Repositories;
+
+using CSR.Domain.Entities;
+using CSR.Application.Interfaces;
+using Microsoft.EntityFrameworkCore;
+
+public class RoleRepository(CSR.Infrastructure.Persistence.CSRDbContext context) : IRoleRepository
+{
+  private readonly CSR.Infrastructure.Persistence.CSRDbContext _context = context;
+
+  public async Task<Role?> GetByIdAsync(int id)
+  {
+    var roleEntity = await _context.Roles
+        .Include(r => r.Id)
+        .SingleOrDefaultAsync(r => r.Id == id);
+
+    if (roleEntity == null)
+    {
+      return null; // No entity found, return null domain model
+    }
+
+    var role = Role.LoadExisting(
+        roleEntity.Id,
+        roleEntity.Name
+    );
+
+    return role;
+  }
+
+
+  public async Task AddAsync(Role role)
+  {
+    var roleEntity = new CSR.Infrastructure.Persistence.Role
+    {
+      Id = role.Id,
+      Name = role.Name
+    };
+
+    _context.Roles.Add(roleEntity);
+    await _context.SaveChangesAsync();
+  }
+
+
+  public async Task DeleteAsync(int id)
+  {
+    var roleEntity = new CSR.Infrastructure.Persistence.Role
+    {
+      Id = id,
+      Name = string.Empty
+    };
+
+    _context.Roles.Remove(roleEntity);
+    await _context.SaveChangesAsync();
+  }
+}