feat(application): IProductTypeRepository + IProductQueryRepository stub + queries (PRD-001)

src/api/SIGCM2.Application/Abstractions/Persistence/IProductQueryRepository.cs

@@ -0,0 +1,15 @@
+namespace SIGCM2.Application.Abstractions.Persistence;
+
+/// <summary>
+/// PRD-002 handoff contract — query-only access to Product data needed by ProductType handlers.
+/// PRD-001 binds to NullProductQueryRepository (always returns false).
+/// PRD-002 binds to Dapper impl against dbo.Product (when that table exists).
+/// </summary>
+public interface IProductQueryRepository
+{
+    /// <summary>
+    /// Returns true if at least one active Product with the given ProductTypeId exists.
+    /// Used by DeactivateProductTypeCommandHandler to guard against orphaning active products.
+    /// </summary>
+    Task<bool> ExistsActiveByProductTypeAsync(int productTypeId, CancellationToken ct = default);
+}

src/api/SIGCM2.Application/Abstractions/Persistence/IProductTypeRepository.cs

@@ -0,0 +1,31 @@
+using SIGCM2.Application.Common;
+using SIGCM2.Domain.Entities;
+
+namespace SIGCM2.Application.Abstractions.Persistence;
+
+/// <summary>
+/// Write-side repository for ProductType.
+/// All reads needed by write handlers are included here.
+/// Query-side (for listing, filtering) uses GetPagedAsync with ProductTypesQuery.
+/// </summary>
+public interface IProductTypeRepository
+{
+    /// <summary>Inserts a new ProductType and returns the DB-assigned Id.</summary>
+    Task<int> AddAsync(ProductType productType, CancellationToken ct = default);
+
+    /// <summary>Returns the ProductType with the given Id, or null if not found.</summary>
+    Task<ProductType?> GetByIdAsync(int id, CancellationToken ct = default);
+
+    /// <summary>Returns a paged result of ProductTypes matching the query.</summary>
+    Task<PagedResult<ProductType>> GetPagedAsync(ProductTypesQuery query, CancellationToken ct = default);
+
+    /// <summary>Persists all changes to an existing ProductType row.</summary>
+    Task UpdateAsync(ProductType productType, CancellationToken ct = default);
+
+    /// <summary>
+    /// Returns true if an active ProductType with the given nombre exists.
+    /// Pass excludeId to skip the self-comparison during rename (update scenario).
+    /// Case-insensitive — delegates to DB collation (SQL_Latin1_General_CP1_CI_AI).
+    /// </summary>
+    Task<bool> ExistsByNombreAsync(string nombre, int? excludeId = null, CancellationToken ct = default);
+}