Adjust logging levels to reduce verbosity

Changed logging levels from LogInformation to LogDebug in
PdfAttachmentExtractorService and PdfResultPackageService.
This includes logs for PDF conformity levels, ZUGFeRD
Guideline-IDs, saved attachment details, and result report
discovery. These changes aim to reduce log verbosity in
production environments by moving less critical information
to the debug level.

DXApp.TemplateKitProject/Services/PdfResultPackageService.cs

@@ -21,7 +21,7 @@ public class PdfResultPackageService(
             return null;
         }
 
-        logger.LogInformation(
+        logger.LogDebug(
             "Ergebnisbericht gefunden: '{ReportPath}'.", reportPath);
 
         // 2. Ausgabepfad bestimmen