Telnyx activity fixes and updates

src/modules/Elsa.Telnyx/Activities/AnswerCall.cs

@@ -46,6 +46,12 @@ public class FlowAnswerCall : AnswerCallBase
 [PublicAPI]
 public class AnswerCall : AnswerCallBase
 {
+    /// <inheritdoc />
+    [JsonConstructor]
+    public AnswerCall()
+    {
+    }
+    
     /// <inheritdoc />
     public AnswerCall([CallerFilePath] string? source = default, [CallerLineNumber] int? line = default) : base(source, line)
     {

src/modules/Elsa.Telnyx/Activities/Dial.cs

@@ -61,7 +61,7 @@ public class Dial : CodeActivity<DialResponse>
     public Input<string?> AnsweringMachineDetection { get; set; } = new("disabled");
 
     /// <summary>
-    /// Enables answering machine detection.
+    /// Start recording automatically after an event. Disabled by default.
     /// </summary>
     [Input(Description = "Start recording automatically after an event. Disabled by default.")]
     public Input<bool> Record { get; set; } = default!;

src/modules/Elsa.Telnyx/Activities/StartRecording.cs

@@ -29,7 +29,6 @@ public class FlowStartRecording : StartRecordingBase
     }
     
     /// <inheritdoc />
-    [JsonConstructor]
     public FlowStartRecording([CallerFilePath] string? source = default, [CallerLineNumber] int? line = default) : base(source, line)
     {
     }

src/modules/Elsa.Telnyx/Constants.cs

@@ -1,7 +1,17 @@
 namespace Elsa.Telnyx;
 
-internal static class Constants
+/// <summary>
+/// Contains constants used by the Telnyx activities.
+/// </summary>
+public static class Constants
 {
+    /// <summary>
+    /// The namespace used by the Telnyx activities.
+    /// </summary>
     public const string Namespace = "Telnyx";
+    
+    /// <summary>
+    /// The category used by the Telnyx activities.
+    /// </summary>
     public const string Category = "Telnyx";
 }