Add "Full Finalize Test" button for PDF finalization debug

Added a new "Full Finalize Test" button to frmFinalizePDF, along with its event handler. The handler loads annotation data, document bytes, and related entities, logs detailed information about the envelope and signatures, and tests the PDF annotation burning process. The result is saved to the desktop and opened automatically. Also added necessary repository/entity imports for EF Core access. This feature aids in debugging and verifying the full PDF finalization workflow.

EnvelopeGenerator.BBTests/frmFinalizePDF.Designer.vb

@@ -27,6 +27,7 @@ Partial Class frmFinalizePDF
         Me.Label2 = New System.Windows.Forms.Label()
         Me.Button1 = New System.Windows.Forms.Button()
         Me.Button2 = New System.Windows.Forms.Button()
+        Me.Button3 = New System.Windows.Forms.Button()
         Me.txtResult = New System.Windows.Forms.TextBox()
         Me.txtEnvelope = New System.Windows.Forms.TextBox()
         Me.SuspendLayout()
@@ -75,6 +76,15 @@ Partial Class frmFinalizePDF
         Me.Button2.Text = "Merge Json"
         Me.Button2.UseVisualStyleBackColor = True
         '
+        'Button3
+        '
+        Me.Button3.Location = New System.Drawing.Point(15, 160)
+        Me.Button3.Name = "Button3"
+        Me.Button3.Size = New System.Drawing.Size(166, 23)
+        Me.Button3.TabIndex = 5
+        Me.Button3.Text = "Full Finalize Test"
+        Me.Button3.UseVisualStyleBackColor = True
+        '
         'txtResult
         '
         Me.txtResult.Location = New System.Drawing.Point(333, 12)
@@ -97,6 +107,7 @@ Partial Class frmFinalizePDF
         Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
         Me.ClientSize = New System.Drawing.Size(800, 450)
         Me.Controls.Add(Me.txtResult)
+        Me.Controls.Add(Me.Button3)
         Me.Controls.Add(Me.Button2)
         Me.Controls.Add(Me.Button1)
         Me.Controls.Add(Me.Label2)
@@ -116,5 +127,6 @@ Partial Class frmFinalizePDF
     Friend WithEvents Label2 As Label
     Friend WithEvents Button1 As Button
     Friend WithEvents Button2 As Button
+    Friend WithEvents Button3 As Button
     Friend WithEvents txtResult As TextBox
 End Class