V13: request queueing (#15176)

* Implement persistence

* Start implementing repository

* Implement repository

* Implement request service

* Dont run WebhookFiring if not in runtime mode run

* Refactor repository and service to have full CRUD

* add tests for Request service

* Implement WebhookRequest lock

* Register hosted service

* Add try catch when firing HttpRequest

* Add migration

* Refactor to use renamed IWebhookService

* Refactor tests too

* Add setting to configure webhook firing period

* Update docs

* Review fixes

* Add column renaming migration

* Remove unused service

* run request in parralel

* Refactor to fire parallel in background

---------

Co-authored-by: Zeegaan <nge@umbraco.dk>
Co-authored-by: Bjarke Berg <mail@bergmania.dk>

src/Umbraco.Core/Configuration/Models/WebhookSettings.cs

@@ -7,6 +7,7 @@ public class WebhookSettings
 {
     private const bool StaticEnabled = true;
     private const int StaticMaximumRetries = 5;
+    internal const string StaticPeriod = "00:00:10";
 
     /// <summary>
     ///     Gets or sets a value indicating whether webhooks are enabled.
@@ -31,4 +32,10 @@ public class WebhookSettings
     /// </remarks>
     [DefaultValue(StaticMaximumRetries)]
     public int MaximumRetries { get; set; } = StaticMaximumRetries;
+
+    /// <summary>
+    ///     Gets or sets a value for the period of the webhook firing.
+    /// </summary>
+    [DefaultValue(StaticPeriod)]
+    public TimeSpan Period { get; set; } = TimeSpan.Parse(StaticPeriod);
 }