fix(catalog): widen Article + Barcode.Code to 500 chars for real-world catalogs

Import against a live MoySklad account crashed with PostgreSQL 22001 after
loading 21500/~N products: Article column was varchar(100), but some MoySklad
items have longer internal codes, and Barcode.Code needed to grow for future
GS1 DataMatrix / Честный ЗНАК tracking codes (up to ~300 chars).

- EF config: Product.Article 100 → 500, ProductBarcode.Code 100 → 500.
- Migration Phase1e_WidenArticleBarcode (applied to dev DB).
- Defensive Trim() in the MoySklad importer for Name/Article/Barcode so even
  future schema drift won't take the whole import down.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/food-market.infrastructure/Integrations/MoySklad/MoySkladImportService.cs

@@ -126,8 +126,8 @@ await foreach (var p in _client.StreamProductsAsync(token, ct))
                 var product = new Product
                 {
                     OrganizationId = orgId,
-                    Name = p.Name,
+                    Name = Trim(p.Name, 500),
-                    Article = article,
+                    Article = Trim(article, 500),
                     Description = p.Description,
                     UnitOfMeasureId = baseUnit.Id,
                     VatRateId = vatId,
@@ -197,13 +197,16 @@ private static List<ProductBarcode> ExtractBarcodes(MsProduct p)
                     "upce" => BarcodeType.Upce,
                     _ => BarcodeType.Other,
                 };
-                list.Add(new ProductBarcode { Code = code, Type = type, IsPrimary = !primarySet });
+                list.Add(new ProductBarcode { Code = code.Length > 500 ? code[..500] : code, Type = type, IsPrimary = !primarySet });
                 primarySet = true;
             }
         }
         return list;
     }
 
+    private static string? Trim(string? s, int max)
+        => string.IsNullOrEmpty(s) ? s : (s.Length <= max ? s : s[..max]);
+
     private static string? TryExtractId(string href)
     {
         // href like "https://api.moysklad.ru/api/remap/1.2/entity/productfolder/<guid>"

src/food-market.infrastructure/Persistence/Configurations/CatalogConfigurations.cs

@@ -123,7 +123,7 @@ private static void ConfigureProduct(EntityTypeBuilder<Product> b)
     {
         b.ToTable("products");
         b.Property(x => x.Name).HasMaxLength(500).IsRequired();
-        b.Property(x => x.Article).HasMaxLength(100);
+        b.Property(x => x.Article).HasMaxLength(500);
         b.Property(x => x.MinStock).HasPrecision(18, 4);
         b.Property(x => x.MaxStock).HasPrecision(18, 4);
         b.Property(x => x.PurchasePrice).HasPrecision(18, 4);
@@ -155,7 +155,8 @@ private static void ConfigureProductPrice(EntityTypeBuilder<ProductPrice> b)
     private static void ConfigureBarcode(EntityTypeBuilder<ProductBarcode> b)
     {
         b.ToTable("product_barcodes");
-        b.Property(x => x.Code).HasMaxLength(100).IsRequired();
+        // Up to 500 to accommodate GS1 DataMatrix / crypto-tail tracking codes (Честный ЗНАК etc.)
+        b.Property(x => x.Code).HasMaxLength(500).IsRequired();
         b.HasOne(x => x.Product).WithMany(p => p.Barcodes).HasForeignKey(x => x.ProductId).OnDelete(DeleteBehavior.Cascade);
         b.HasIndex(x => new { x.OrganizationId, x.Code }).IsUnique();
     }

src/food-market.infrastructure/Persistence/Migrations/20260421191122_Phase1e_WidenArticleBarcode.cs

@@ -0,0 +1,64 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace foodmarket.Infrastructure.Persistence.Migrations
+{
+    /// <inheritdoc />
+    public partial class Phase1e_WidenArticleBarcode : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<string>(
+                name: "Article",
+                schema: "public",
+                table: "products",
+                type: "character varying(500)",
+                maxLength: 500,
+                nullable: true,
+                oldClrType: typeof(string),
+                oldType: "character varying(100)",
+                oldMaxLength: 100,
+                oldNullable: true);
+
+            migrationBuilder.AlterColumn<string>(
+                name: "Code",
+                schema: "public",
+                table: "product_barcodes",
+                type: "character varying(500)",
+                maxLength: 500,
+                nullable: false,
+                oldClrType: typeof(string),
+                oldType: "character varying(100)",
+                oldMaxLength: 100);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<string>(
+                name: "Article",
+                schema: "public",
+                table: "products",
+                type: "character varying(100)",
+                maxLength: 100,
+                nullable: true,
+                oldClrType: typeof(string),
+                oldType: "character varying(500)",
+                oldMaxLength: 500,
+                oldNullable: true);
+
+            migrationBuilder.AlterColumn<string>(
+                name: "Code",
+                schema: "public",
+                table: "product_barcodes",
+                type: "character varying(100)",
+                maxLength: 100,
+                nullable: false,
+                oldClrType: typeof(string),
+                oldType: "character varying(500)",
+                oldMaxLength: 500);
+        }
+    }
+}

src/food-market.infrastructure/Persistence/Migrations/AppDbContextModelSnapshot.cs

@@ -546,8 +546,8 @@ protected override void BuildModel(ModelBuilder modelBuilder)
                         .HasColumnType("uuid");
 
                     b.Property<string>("Article")
-                        .HasMaxLength(100)
+                        .HasMaxLength(500)
-                        .HasColumnType("character varying(100)");
+                        .HasColumnType("character varying(500)");
 
                     b.Property<Guid?>("CountryOfOriginId")
                         .HasColumnType("uuid");
@@ -648,8 +648,8 @@ protected override void BuildModel(ModelBuilder modelBuilder)
 
                     b.Property<string>("Code")
                         .IsRequired()
-                        .HasMaxLength(100)
+                        .HasMaxLength(500)
-                        .HasColumnType("character varying(100)");
+                        .HasColumnType("character varying(500)");
 
                     b.Property<DateTime>("CreatedAt")
                         .HasColumnType("timestamp with time zone");