add MediaHash. Step1

Azaion.Common/Services/Cache.cs

@@ -5,6 +5,7 @@ namespace Azaion.Common.Services;
 public interface ICache
 {
     T GetFromCache<T>(string key, Func<T> fetchFunc, TimeSpan? expiration = null);
+    Task<T> GetFromCacheAsync<T>(string key, Func<Task<T>> fetchFunc, TimeSpan? expiration = null);
     void Invalidate(string key);
 }
 
@@ -23,5 +24,16 @@ public class MemoryCache : ICache
         });
     }
 
+    public async Task<T> GetFromCacheAsync<T>(string key, Func<Task<T>> fetchFunc, TimeSpan? expiration = null)
+    {
+        expiration ??= TimeSpan.FromHours(4);
+        return await _cache.GetOrAddAsync(key, async entry =>
+        {
+            var result = await fetchFunc();
+            entry.AbsoluteExpirationRelativeToNow = expiration;
+            return result;
+        });
+    }
+
     public void Invalidate(string key) => _cache.Remove(key);
 }