Expand usings; add note on generic vs per-entity repos

Expanded using directives to support additional dependencies in CatalogRepository.cs. Added a detailed comment explaining why per-entity repository implementations are preferred over a generic CRUD base service in this context, due to unique domain logic and stored procedure requirements. No functional code changes were made.

DbFirst.Infrastructure/Repositories/CatalogRepository.cs

@@ -1,12 +1,35 @@
-using DbFirst.Domain.Repositories;
+using Azure;
 using DbFirst.Domain.Entities;
+using DbFirst.Domain.Repositories;
 using Microsoft.Data.SqlClient;
 using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
 using System.Data;
+using System.Text;
+using System.Threading.Channels;
+using static Microsoft.EntityFrameworkCore.DbLoggerCategory;
+using static System.Runtime.InteropServices.JavaScript.JSType;
 
 namespace DbFirst.Infrastructure.Repositories;
 
 // TODO: instead of creating implementation of repository per entity, consider using generic repository pattern (eg. Repository<T>) to reduce code duplication.
+
+/* Copilot's Response:
+A generic CRUD base service adds little value in your case:
+
+Pros:
+• Less boilerplate for simple entities without special logic.
+• Uniform CRUD signatures.
+
+Cons/Practical here:
+• Domain logic differs per entity(unique title check, setting audit fields, forbidding title changes, stored procs with output GUID).
+• Generic services tend to be diluted by virtual methods/hooks for special cases—ending up with per-entity overrides and little real gain.
+• With stored procedures and output parameters, the pattern doesn’t fit cleanly because operations aren’t symmetric (separate procs for insert/update/delete).
+
+Conclusion: For this solution a generic service would be more overhead than benefit. If you later have multiple very similar entities without special logic,
+you could consider a lightweight generic interface/base; for now, the specialized service implementation is cleaner. */
+
 public class CatalogRepository : ICatalogRepository
 {
     private readonly ApplicationDbContext _db;