Make SqlScaleMonitor and SqlScaleMetric public for Scale Controller Redesign

src/DurableTask.SqlServer.AzureFunctions/SqlScaleMetric.cs

@@ -5,7 +5,10 @@ namespace DurableTask.SqlServer.AzureFunctions
 {
     using Microsoft.Azure.WebJobs.Host.Scale;
 
-    class SqlScaleMetric : ScaleMetrics
+    /// <summary>
+    /// Contains metrics used to make scale decisions for a SqlScaleMetric.
+    /// </summary>
+    public class SqlScaleMetric : ScaleMetrics
     {
         public int RecommendedReplicaCount { get; set; }
     }

src/DurableTask.SqlServer.AzureFunctions/SqlScaleMonitor.cs

@@ -13,7 +13,7 @@ namespace DurableTask.SqlServer.AzureFunctions
     /// <summary>
     /// Azure Functions scale monitor implementation for the Durable Functions SQL backend.
     /// </summary>
-    class SqlScaleMonitor : IScaleMonitor<SqlScaleMetric>
+    public class SqlScaleMonitor : IScaleMonitor<SqlScaleMetric>
     {
         static readonly ScaleStatus ScaleInVote = new ScaleStatus { Vote = ScaleVote.ScaleIn };
         static readonly ScaleStatus NoScaleVote = new ScaleStatus { Vote = ScaleVote.None };
@@ -23,6 +23,12 @@ class SqlScaleMonitor : IScaleMonitor<SqlScaleMetric>
 
         int? previousWorkerCount = -1;
 
+        /// <summary>
+        /// Creates a SqlScaleMonitor instance.
+        /// </summary>
+        /// <param name="service">The SqlOrchestrationService used to create the connection.</param>
+        /// <param name="taskHubName">The name of the monitored task hub.</param>
+        /// <exception cref="ArgumentNullException"></exception>
         public SqlScaleMonitor(SqlOrchestrationService service, string taskHubName)
         {
             this.service = service ?? throw new ArgumentNullException(nameof(service));