Replace CSV export with PDF report generation

- Add QuestPDF library for professional PDF generation
- Create PdfReportService with formatted table layout
- Export includes score (color-coded), verified employers, gaps, and flags
- Report has header, footer with page numbers, and alternating row colors

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

src/TrueCV.Web/Program.cs

@@ -7,6 +7,7 @@ using TrueCV.Infrastructure.Data;
 using TrueCV.Infrastructure.Identity;
 using TrueCV.Web;
 using TrueCV.Web.Components;
+using TrueCV.Web.Services;
 
 // Configure Serilog
 Log.Logger = new LoggerConfiguration()
@@ -32,6 +33,9 @@ try
     // Add Infrastructure services (DbContext, Hangfire, HttpClients, Services)
     builder.Services.AddInfrastructure(builder.Configuration);
 
+    // Add Web services
+    builder.Services.AddScoped<PdfReportService>();
+
     // Add Identity with secure password requirements
     builder.Services.AddIdentity<ApplicationUser, IdentityRole<Guid>>(options =>
     {