refactor(PDFBurner): enhance annotation ID handling and validation

- Added parsing of annotation `id` into `envelopeId`, `receiverId`, `index`, and `internalType`.
- Added validation for `id` format, ensuring it has exactly 4 parts and numeric checks for relevant fields.
- Throws `BurnAnnotationException` if `id` is null, empty, or incorrectly formatted.
- Maintains existing functionality for adding image, ink, and widget annotations.

EnvelopeGenerator.CommonServices/Jobs/FinalizeDocument/PDFBurner.vb

@@ -193,7 +193,50 @@ Namespace Jobs.FinalizeDocument
         End Class
 
         Friend Class Annotation
+
+            Private _id As Integer
+
+            Public envelopeId As Integer
+
+            Public receiverId As Integer
+
+            Public index As Integer
+
+            Public internalType As String
+
             Public Property id As String
+                Get
+                    Return _id
+                End Get
+                Set(value As String)
+                    _id = value
+
+                    If String.IsNullOrWhiteSpace(id) Then
+                        Throw New BurnAnnotationException("The identifier of annotation is null or empty.")
+                    End If
+
+                    Dim parts As String() = value.Split("-"c)
+
+                    If (parts.Length <> 4) Then
+                        Throw New BurnAnnotationException($"The identifier of annotation has more or less than 4 sub-part. Id: {_id}")
+                    End If
+
+                    If Not Integer.TryParse(parts(0), envelopeId) Then
+                        Throw New BurnAnnotationException($"The envelope ID of annotation is not integer. Id: {_id}")
+                    End If
+
+                    If Not Integer.TryParse(parts(1), receiverId) Then
+                        Throw New BurnAnnotationException($"The receiver ID of annotation is not integer. Id: {_id}")
+                    End If
+
+                    If Not Integer.TryParse(parts(2), index) Then
+                        Throw New BurnAnnotationException($"The index of annotation is not integer. Id: {_id}")
+                    End If
+
+                    internalType = parts(3)
+                End Set
+            End Property
+
             Public Property bbox As List(Of Double)
             Public Property type As String
             Public Property isSignature As Boolean