Added logic to filter history records by receiver signature when provided in
RemoveSignatureNotification. This ensures only relevant signed entries are deleted.
Updated the RemoveDocStatusHandler to refine document status deletion logic.
Now filters by EnvelopeUuid and optionally by ReceiverSignature when provided.
Added a new nullable ReceiverSignature property to the RemoveSignatureNotification record
to support handling receiver-specific signature removal events.
- Implements INotificationHandler<RemoveSignatureNotification>
- Deletes Annotation entities matching the Envelope UUID from the repository
- Uses IRepository<Annotation> for data access
- Added `UnstructuredAnnotations` property to handle annotations without structured IDs
- Changed default `hasStructuredID` to `False`, set to `True` only after successful parsing
- Updated `AddInstantJSONAnnotationToPDF` to process annotations directly instead of grouping by receiver
- Simplified logic for reversing annotations and applying seal positioning
