Refactored `Pkcs11Options` by removing `DefaultCertificationLevel` and improving property documentation. Replaced `VisualSignature` in `PdfSignOptionsDto` with `Appearance` using the new `PdfSignatureAppearanceDto` class, which encapsulates signature appearance details, including font and color settings.
Enhanced `PdfSignatureCertificationLevel` enum with more descriptive values and added XML documentation. Updated `IPdfDigitalSignatureService` to support optional signature images and removed redundant methods.
Refactored `PdfDigitalSignatureService` to streamline appearance handling, validate inputs, and improve maintainability. Removed unused methods and added support for `PdfSignatureAppearanceDto`.
Simplified `PdfSignatureController` by consolidating form properties into `PdfSignOptionsDto`. Improved code readability and flexibility while removing redundant logic.
Updated the `Pkcs11Options` class to rename the `DefaultApplicationName` property to `ApplicationName`, clarifying its role as a globally controlled value embedded in PDF signature metadata.
Modified `PdfDigitalSignatureService` to source `ApplicationName` directly from `Pkcs11Options`, removing client-level overrides. Updated `PdfSignatureController` to reflect this change by removing the `ApplicationName` property from `SignOptions`.
Updated `appsettings.json` and `README.md` to reflect the property name change. These changes enforce stricter configuration control, improving metadata consistency and security.
Introduced `Pkcs11Options` for configuring PKCS#11 signing workflows, including properties for library path, token selection, and signing metadata. Added `PdfSignOptionsDto` to represent signing options and `PdfSignatureCheckResultDto` with related DTOs for signature validation.
Defined `PdfSignatureCertificationLevel` enum for certification levels. Added `IPdfDigitalSignatureService` interface to support signing and validating PDF signatures. These changes enable robust and extensible handling of digital signatures.
