Adds queue duplicate detection behavior docs

Introduces a queue behavior that automatically detects and discards duplicate entries in a queue based on a unique identifier using a cache.

Also, adds "Foundatio" to the cSpell dictionary.

Author: niemyjski

.vscode/settings.json

@@ -1,10 +1,11 @@
 {
   "cSpell.words": [
     "Dgram",
-    "Sachin",
-    "Xunit",
+    "Foundatio",
     "mygauge",
-    "unscoped"
+    "Sachin",
+    "unscoped",
+    "Xunit"
   ],
   "msbuildProjectTools.nuget.includePreRelease": true
 }

src/Foundatio/Queues/DuplicateDetectionQueueBehavior.cs

@@ -5,6 +5,9 @@
 
 namespace Foundatio.Queues;
 
+/// <summary>
+/// Automatically detects and discards duplicate entries in a queue based on a unique identifier.
+/// </summary>
 public class DuplicateDetectionQueueBehavior<T> : QueueBehaviorBase<T> where T : class
 {
     private readonly ICacheClient _cacheClient;