Add printer-config integration and Rust transformation flow docs

PrintService/Services/DocumentProcessor.cs

@@ -12,18 +12,23 @@ namespace PrintService.Services;
 public class DocumentProcessor
 {
     private readonly AppSettings _settings;
+    private readonly ConfigurationService _configService;
     private readonly ILogger<DocumentProcessor> _logger;
 
-    public DocumentProcessor(IOptions<AppSettings> settings, ILogger<DocumentProcessor> logger)
+    public DocumentProcessor(
+        IOptions<AppSettings> settings,
+        ConfigurationService configService,
+        ILogger<DocumentProcessor> logger)
     {
         _settings = settings.Value;
+        _configService = configService;
         _logger = logger;
     }
 
     /// <summary>
     /// Process and transform document content
     /// </summary>
-    public string ProcessDocument(string content, DocumentConfig config)
+    public string ProcessDocument(string content, DocumentTypeConfig config)
     {
         var processed = content;
 
@@ -48,12 +53,11 @@ public class DocumentProcessor
     }
 
     /// <summary>
-    /// Get document configuration by type
+    /// Get document configuration by type from printer-config.json
     /// </summary>
-    public DocumentConfig? GetDocumentConfig(string documentType)
+    public DocumentTypeConfig? GetDocumentConfig(string documentType)
     {
-        return _settings.DocumentTypes.FirstOrDefault(dt => 
-            dt.Name.Equals(documentType, StringComparison.OrdinalIgnoreCase));
+        return _configService.GetDocumentType(documentType);
     }
 
     /// <summary>
@@ -67,7 +71,7 @@ public class DocumentProcessor
     /// <summary>
     /// Archive or delete file after processing
     /// </summary>
-    public void PostProcess(PrintJob job, DocumentConfig config)
+    public void PostProcess(PrintJob job, DocumentTypeConfig config)
     {
         try
         {