[CLAUDE] Master: nạp master data thật từ Excel (62 dự án + 71 hạng mục + 3 NCC) + Project +4 cột (Mig 48)

Nạp master data công ty từ file Excel 'HẠNG MỤC CÔNG VIỆC DỰ ÁN':
- 62 Projects (Mã + Năm; tên/CĐT/địa điểm/gói thầu cho ~6 dự án có chi tiết)
- 71 WorkItems: Vật tư 16 · Thầu phụ 30 · MEP 9 · Thiết bị 16
- 3 Suppliers (TRUONGGIANG/TANPHU/TGN)

Mig 48 AddProjectMasterFields: Project +4 cột nullable (Year/Investor/Location/Package) + ProjectFeatures DTO/Create/Update + ProjectsPage form ×2 app (SHA256 mirror).
SeedRealMasterDataAsync per-code idempotent, UNGATED → reaches prod (coexist demo). FLOCK01 collision → skip (demo wins).

Verify: build 0-err · test 216 PASS · runtime Dev proof (data landed, Investor col populates). Provenance: scripts/master-import-data.generated.md.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/Backend/SolutionErp.Infrastructure/Persistence/Migrations/20260609020759_AddProjectMasterFields.cs

@@ -0,0 +1,61 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace SolutionErp.Infrastructure.Persistence.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddProjectMasterFields : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "Investor",
+                table: "Projects",
+                type: "nvarchar(250)",
+                maxLength: 250,
+                nullable: true);
+
+            migrationBuilder.AddColumn<string>(
+                name: "Location",
+                table: "Projects",
+                type: "nvarchar(500)",
+                maxLength: 500,
+                nullable: true);
+
+            migrationBuilder.AddColumn<string>(
+                name: "Package",
+                table: "Projects",
+                type: "nvarchar(300)",
+                maxLength: 300,
+                nullable: true);
+
+            migrationBuilder.AddColumn<int>(
+                name: "Year",
+                table: "Projects",
+                type: "int",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "Investor",
+                table: "Projects");
+
+            migrationBuilder.DropColumn(
+                name: "Location",
+                table: "Projects");
+
+            migrationBuilder.DropColumn(
+                name: "Package",
+                table: "Projects");
+
+            migrationBuilder.DropColumn(
+                name: "Year",
+                table: "Projects");
+        }
+    }
+}

src/Backend/SolutionErp.Infrastructure/Persistence/Migrations/ApplicationDbContextModelSnapshot.cs

@@ -3484,9 +3484,17 @@ namespace SolutionErp.Infrastructure.Persistence.Migrations
                     b.Property<DateTime?>("EndDate")
                         .HasColumnType("datetime2");
 
+                    b.Property<string>("Investor")
+                        .HasMaxLength(250)
+                        .HasColumnType("nvarchar(250)");
+
                     b.Property<bool>("IsDeleted")
                         .HasColumnType("bit");
 
+                    b.Property<string>("Location")
+                        .HasMaxLength(500)
+                        .HasColumnType("nvarchar(500)");
+
                     b.Property<Guid?>("ManagerUserId")
                         .HasColumnType("uniqueidentifier");
 
@@ -3499,6 +3507,10 @@ namespace SolutionErp.Infrastructure.Persistence.Migrations
                         .HasMaxLength(1000)
                         .HasColumnType("nvarchar(1000)");
 
+                    b.Property<string>("Package")
+                        .HasMaxLength(300)
+                        .HasColumnType("nvarchar(300)");
+
                     b.Property<DateTime?>("StartDate")
                         .HasColumnType("datetime2");
 
@@ -3508,6 +3520,9 @@ namespace SolutionErp.Infrastructure.Persistence.Migrations
                     b.Property<Guid?>("UpdatedBy")
                         .HasColumnType("uniqueidentifier");
 
+                    b.Property<int?>("Year")
+                        .HasColumnType("int");
+
                     b.HasKey("Id");
 
                     b.HasIndex("Code")