Create runtime variables and remove MessagePack.

Models/Model/Backend/DatabaseSizes.cs

@@ -1,16 +1,10 @@
-using MessagePack;
-
 namespace Models.Model.Backend;
 
-[MessagePackObject]
 public struct DatabaseSizes
 {
-    [Key(0)]
     public double DiscardedDbSize { get; set; }
-
-    [Key(1)]
+    
     public double FilteredDbSize { get; set; }
-
-    [Key(2)]
+    
     public double MyDbSize { get; set; }
 }

Models/Model/Backend/RuntimeVariable.cs

@@ -0,0 +1,9 @@
+namespace Models.Model.Backend;
+
+public enum RuntimeVariable
+{
+    DbContent,
+    DbDiscarded,
+    ContentFilter,
+    ScannerTimeout
+}