Added missing functionalities from main as part of the blueberry merge

src/clients/Elsa.Api.Client/Resources/Alterations/Models/Cancel.cs

@@ -0,0 +1,6 @@
+namespace Elsa.Api.Client.Resources.Alterations.Models;
+
+/// <summary>
+/// Cancels the workflow instances in an alteration plan.
+/// </summary>
+public class Cancel : AlterationBase;

src/modules/Elsa.Workflows.Runtime/Features/WorkflowRuntimeFeature.cs

@@ -154,6 +154,15 @@ public class WorkflowRuntimeFeature(IModule module) : FeatureBase(module)
         Services.Configure<WorkflowInboxCleanupOptions>(options => { options.IsEnabled = false; });
         return this;
     }
+    
+    /// <summary>
+    /// Disables the purge bookmark queue recurring task.
+    /// </summary>
+    public WorkflowRuntimeFeature DisablePurgeBookmarkQueueRecurringTask()
+    {
+        Services.Configure<BookmarkQueuePurgeOptions>(options => { options.IsEnabled = false; });
+        return this;
+    }
 
     /// <summary>
     /// Register the specified workflow type.
@@ -312,7 +321,7 @@ public class WorkflowRuntimeFeature(IModule module) : FeatureBase(module)
             .AddRecurringTask<TriggerBookmarkQueueRecurringTask>(TimeSpan.FromMinutes(1))
             .AddRecurringTask<PurgeBookmarkQueueRecurringTask>(TimeSpan.FromSeconds(10))
             .AddRecurringTask<RestartInterruptedWorkflowsTask>(TimeSpan.FromMinutes(5)) // Same default as the workflow liveness threshold.
-
+            
             // Distributed locking.
             .AddSingleton(DistributedLockProvider)
 

src/modules/Elsa.Workflows.Runtime/Options/BookmarkQueuePurgeOptions.cs

@@ -14,4 +14,9 @@ public class BookmarkQueuePurgeOptions
     /// The number of records to clean up per sweep.
     /// </summary>
     public int BatchSize { get; set; } = 1000;
+    
+    /// <summary>
+    /// Whether the bookmark queue purge is enabled.
+    /// </summary>
+    public bool IsEnabled { get; set; } = true;
 }

src/modules/Elsa.Workflows.Runtime/Services/DefaultBookmarkQueuePurger.cs

@@ -15,6 +15,12 @@ public class DefaultBookmarkQueuePurger(IBookmarkQueueStore store, ISystemClock
 {
     public async Task PurgeAsync(CancellationToken cancellationToken = default)
     {
+        if (!options.Value.IsEnabled)
+        {
+            logger.LogInformation("Purging bookmark queue is disabled");
+            return;
+        }
+        
         var currentPage = 0;
         var now = systemClock.UtcNow;
         var thresholdDate = now - options.Value.Ttl;