Optimize GetConvertedType by using a server-side query (#622)

Prevents tons of SOH allocations (apparently up to 121.1 MB even
locally) and makes things (more than) a tiny bit more efficient. Should
be the same logic.

Refresh.GameServer/Database/GameDatabaseContext.Assets.cs

@@ -21,20 +21,19 @@ public DatabaseList<GameAsset> GetAssetsUploadedByUser(GameUser? user, int skip,
 
     public GameAssetType? GetConvertedType(string hash)
     {
-        IQueryable<GameAsset> assets = this.GameAssets;
-
-        foreach (GameAsset asset in assets)
-        {
-            //If the asset hash is the requested hash, its not a converted file
-            if (asset.AssetHash == hash) return null;
+        GameAsset? asset = this.GameAssets.FirstOrDefault(a => a.AssetHash == hash ||
+                                                                           a.AsMainlineIconHash == hash ||
+                                                                           a.AsMipIconHash == hash);
+        //If the asset hash is the requested hash, its not a converted file
+        if (asset == null || asset.AssetHash == hash)
+            return null;
 
-            if (asset.AsMainlineIconHash == hash)
-                return GameAssetType.Png;
+        if (asset.AsMainlineIconHash == hash)
+            return GameAssetType.Png;
+
+        if (asset.AsMipIconHash == hash)
+            return GameAssetType.Mip;
 
-            if (asset.AsMipIconHash == hash)
-                return GameAssetType.Mip;
-        }
-
         return null;
     }