feat: Add specialized client implementations for PDF operations

DocumentService.Client/Clients/SwissQrCodeClient.cs

@@ -0,0 +1,44 @@
+using DocumentService.Client.Interfaces;
+using DocumentService.Client.Models.Requests;
+using Microsoft.Extensions.Logging;
+using System.Net.Http;
+
+namespace DocumentService.Client.Clients;
+
+/// <summary>
+/// Implementation of Swiss QR Code extraction client.
+/// </summary>
+public class SwissQrCodeClient(HttpClient httpClient, ILogger<SwissQrCodeClient> logger) : BaseDocumentClient(httpClient, logger), ISwissQrCodeClient
+{
+    /// <inheritdoc />
+    public async Task<SwissQrCodeExtractionResult> ExtractSwissQrCodeAsync(Stream pdfStream, bool raw = false, CancellationToken cancellationToken = default)
+    {
+        var endpoint = $"/api/pdf/qr-code/extract-swiss?raw={raw}";
+
+        var result = await SendMultipartAsync<SwissQrCodeExtractionResult>(
+            endpoint,
+            pdfStream,
+            "document.pdf",
+            cancellationToken);
+
+        return result ?? throw new InvalidOperationException("API returned null response");
+    }
+
+    /// <inheritdoc />
+    public async Task<SwissQrCodeExtractionResult> ExtractSwissQrCodeAsync(byte[] pdfBytes, bool raw = false, CancellationToken cancellationToken = default)
+    {
+        var endpoint = $"/api/pdf/qr-code/extract-swiss?raw={raw}";
+
+        var request = new ExtractSwissQrCodeBase64Request
+        {
+            Base64Pdf = ToBase64(pdfBytes)
+        };
+
+        var result = await SendJsonAsync<ExtractSwissQrCodeBase64Request, SwissQrCodeExtractionResult>(
+            endpoint,
+            request,
+            cancellationToken);
+
+        return result ?? throw new InvalidOperationException("API returned null response");
+    }
+}