Add Notifiarr support (#52)

code/Infrastructure/Verticals/Context/ContextProvider.cs

@@ -0,0 +1,24 @@
+using System.Collections.Immutable;
+
+namespace Infrastructure.Verticals.Context;
+
+public static class ContextProvider
+{
+    private static readonly AsyncLocal<ImmutableDictionary<string, object>> _asyncLocalDict = new();
+
+    public static void Set(string key, object value)
+    {
+        ImmutableDictionary<string, object> currentDict = _asyncLocalDict.Value ?? ImmutableDictionary<string, object>.Empty;
+        _asyncLocalDict.Value = currentDict.SetItem(key, value);
+    }
+
+    public static object? Get(string key)
+    {
+        return _asyncLocalDict.Value?.TryGetValue(key, out object? value) is true ? value : null;
+    }
+    
+    public static T? Get<T>(string key) where T : class
+    {
+        return Get(key) as T;
+    }
+}