refactor: Rename Project to Job with enhanced model

Rename the Project concept to Job for clarity:
- Add Job, JobPart, JobStock entities
- JobStock supports both inventory stock and custom lengths
- Add JobNumber field for job identification
- Add priority-based stock allocation for cut optimization
- Include Jobs UI pages (Index, Edit, Results)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CutList.Web/Migrations/20260204223202_AddJobStock.cs

@@ -0,0 +1,74 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace CutList.Web.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddJobStock : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "JobStocks",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "int", nullable: false)
+                        .Annotation("SqlServer:Identity", "1, 1"),
+                    JobId = table.Column<int>(type: "int", nullable: false),
+                    MaterialId = table.Column<int>(type: "int", nullable: false),
+                    StockItemId = table.Column<int>(type: "int", nullable: true),
+                    LengthInches = table.Column<decimal>(type: "decimal(10,4)", precision: 10, scale: 4, nullable: false),
+                    Quantity = table.Column<int>(type: "int", nullable: false),
+                    IsCustomLength = table.Column<bool>(type: "bit", nullable: false),
+                    Priority = table.Column<int>(type: "int", nullable: false),
+                    SortOrder = table.Column<int>(type: "int", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_JobStocks", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_JobStocks_Jobs_JobId",
+                        column: x => x.JobId,
+                        principalTable: "Jobs",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_JobStocks_Materials_MaterialId",
+                        column: x => x.MaterialId,
+                        principalTable: "Materials",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_JobStocks_StockItems_StockItemId",
+                        column: x => x.StockItemId,
+                        principalTable: "StockItems",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.SetNull);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_JobStocks_JobId",
+                table: "JobStocks",
+                column: "JobId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_JobStocks_MaterialId",
+                table: "JobStocks",
+                column: "MaterialId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_JobStocks_StockItemId",
+                table: "JobStocks",
+                column: "StockItemId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "JobStocks");
+        }
+    }
+}