fix(api): ExceptionFilter 409 para ProductTypeInactivo y RubroInactivo (PRD-002 W1)

tests/SIGCM2.Api.Tests/Products/ProductsControllerTests.cs

@@ -336,4 +336,32 @@ public sealed class ProductsControllerTests : IAsyncLifetime
         var resp = await _client.SendAsync(req);
         Assert.Equal(HttpStatusCode.NotFound, resp.StatusCode);
     }
+
+    // ── PRD-002 W1: ExceptionFilter 409 for ProductTypeInactivo ──────────────
+
+    [Fact]
+    public async Task Create_WithInactiveProductType_Returns409()
+    {
+        var token = await GetAdminTokenAsync();
+        var (medioId, productTypeId) = await EnsureMedioAndProductTypeAsync(token);
+
+        // Deactivate the ProductType first
+        using var deactivatePtReq = BuildRequest(HttpMethod.Delete, $"/api/v1/admin/product-types/{productTypeId}", bearerToken: token);
+        var deactivatePtResp = await _client.SendAsync(deactivatePtReq);
+        Assert.Equal(HttpStatusCode.NoContent, deactivatePtResp.StatusCode);
+
+        // Now attempt to create a product with the inactive ProductType
+        using var createReq = BuildRequest(HttpMethod.Post, AdminEndpoint, new
+        {
+            nombre = $"Prod_{Guid.NewGuid():N}"[..28],
+            medioId,
+            productTypeId,
+            basePrice = 50m
+        }, token);
+        var createResp = await _client.SendAsync(createReq);
+
+        Assert.Equal(HttpStatusCode.Conflict, createResp.StatusCode);
+        var body = await createResp.Content.ReadFromJsonAsync<JsonElement>();
+        Assert.Equal("product_type_inactivo", body.GetProperty("error").GetString());
+    }
 }