refactor: Update Application layer for Codecrete Bill integration

- Change SwissQrCodeExtractionResult to use Bill + RawLines
- Update ISwissQrCodeProcessor to return tuple (Bill, string[])
- Add Codecrete.SwissQRBill.Generator v3.4.0 package reference
- Update ExtractSwissQrCodeQuery handler to use AutoMapper for Bill->DTO mapping
- Remove References property from query (not needed for QR extraction)

DocumentOperator.Application/SwissQrCode/Queries/ExtractSwissQrCodeQuery.cs

@@ -19,11 +19,6 @@ public record ExtractSwissQrCodeQuery : IRequest<SwissQrCodeExtractionResult>
     /// PDF as Base64 string (API clients)
     /// </summary>
     public string? Base64Pdf { get; init; }
-
-    /// <summary>
-    /// Optional reference strings (passed through to response for external tracking)
-    /// </summary>
-    public IReadOnlyList<string>? References { get; init; }
 }
 
 /// <summary>
@@ -34,23 +29,24 @@ public class ExtractSwissQrCodeQueryHandler(ISwissQrCodeProcessor qrCodeProcesso
     : IRequestHandler<ExtractSwissQrCodeQuery, SwissQrCodeExtractionResult>
 {
     /// <summary>
-    /// Extracts and parses Swiss QR Code from the last page of the PDF
+    /// Extracts and parses Swiss QR Code from the PDF (default: scans all pages starting with last)
+    /// Returns both parsed Bill DTO and raw QR text lines
     /// </summary>
     public async Task<SwissQrCodeExtractionResult> Handle(ExtractSwissQrCodeQuery request, CancellationToken cancellationToken)
     {
         // Use byte[] if available, otherwise convert Base64
         byte[] pdfBytes = request.PdfBytes ?? Convert.FromBase64String(request.Base64Pdf!);
 
-        // Extract and parse Swiss QR Code from last page (can throw PdfProcessingException or QrCodeNotFoundException)
-        var qrCodeData = await qrCodeProcessor.ExtractSwissQrCodeAsync(pdfBytes, cancellationToken);
+        // Extract: returns (Bill, RawLines)
+        var (bill, rawLines) = await qrCodeProcessor.ExtractSwissQrCodeAsync(pdfBytes, pageNumbers: null, cancellationToken);
 
-        // Map domain value object to DTO using AutoMapper
-        var qrCodeDto = mapper.Map<SwissQrCodeDataDto>(qrCodeData);
+        // Map Codecrete Bill to DTO using AutoMapper
+        var billDto = mapper.Map<SwissQrBillDto>(bill);
 
-        // Return references (passed through) + QR code data
+        // Return references (passed through) + Bill DTO + raw lines
         return new SwissQrCodeExtractionResult(
-            References: request.References ?? [],
-            QrCodeData: qrCodeDto
+            Bill: billDto,
+            RawLines: rawLines
         );
     }
 }