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/20260204222017_AddJobNumber.cs

@@ -0,0 +1,74 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace CutList.Web.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddJobNumber : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<string>(
+                name: "Name",
+                table: "Jobs",
+                type: "nvarchar(100)",
+                maxLength: 100,
+                nullable: true,
+                oldClrType: typeof(string),
+                oldType: "nvarchar(100)",
+                oldMaxLength: 100);
+
+            migrationBuilder.AddColumn<string>(
+                name: "JobNumber",
+                table: "Jobs",
+                type: "nvarchar(20)",
+                maxLength: 20,
+                nullable: false,
+                defaultValue: "");
+
+            // Generate job numbers for existing jobs
+            migrationBuilder.Sql(@"
+                WITH NumberedJobs AS (
+                    SELECT Id, ROW_NUMBER() OVER (ORDER BY Id) AS RowNum
+                    FROM Jobs
+                )
+                UPDATE j
+                SET j.JobNumber = 'JOB-' + RIGHT('00000' + CAST(nj.RowNum AS VARCHAR(5)), 5)
+                FROM Jobs j
+                INNER JOIN NumberedJobs nj ON j.Id = nj.Id
+            ");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Jobs_JobNumber",
+                table: "Jobs",
+                column: "JobNumber",
+                unique: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_Jobs_JobNumber",
+                table: "Jobs");
+
+            migrationBuilder.DropColumn(
+                name: "JobNumber",
+                table: "Jobs");
+
+            migrationBuilder.AlterColumn<string>(
+                name: "Name",
+                table: "Jobs",
+                type: "nvarchar(100)",
+                maxLength: 100,
+                nullable: false,
+                defaultValue: "",
+                oldClrType: typeof(string),
+                oldType: "nvarchar(100)",
+                oldMaxLength: 100,
+                oldNullable: true);
+        }
+    }
+}