Add Elastic-bound logging of (almost) all database update events

PluralKit.Core/Logging/PatchObjectDestructuring.cs

@@ -0,0 +1,30 @@
+using System.Collections.Generic;
+
+using Serilog.Core;
+using Serilog.Events;
+
+namespace PluralKit.Core
+{
+    public class PatchObjectDestructuring: IDestructuringPolicy
+    {
+        public bool TryDestructure(object value, ILogEventPropertyValueFactory factory,
+                                   out LogEventPropertyValue result)
+        {
+            result = null;
+            if (!(value is PatchObject po)) return false;
+            
+            var propList = new List<LogEventProperty>();
+            foreach (var props in po.GetType().GetProperties())
+            {
+                var propValue = props.GetValue(po);
+                if (propValue is IPartial p && p.IsPresent)
+                    propList.Add(new LogEventProperty(props.Name, factory.CreatePropertyValue(p.RawValue)));
+                else if (!(propValue is IPartial))
+                    propList.Add(new LogEventProperty(props.Name, factory.CreatePropertyValue(propValue)));
+            }
+
+            result = new StructureValue(propList);
+            return true;
+        }
+    }
+}