feat: rewrite database schema for localized autoproxy

PluralKit.Core/Models/Patch/AutoproxyPatch.cs

@@ -0,0 +1,21 @@
+using Newtonsoft.Json.Linq;
+
+using NodaTime;
+
+using SqlKata;
+
+namespace PluralKit.Core;
+
+public class AutoproxyPatch : PatchObject
+{
+    public Partial<AutoproxyMode> AutoproxyMode { get; set; }
+    public Partial<MemberId?> AutoproxyMember { get; set; }
+
+    public Partial<Instant> LastLatchTimestamp { get; set; }
+
+    public override Query Apply(Query q) => q.ApplyPatch(wrapper => wrapper
+        .With("autoproxy_mode", AutoproxyMode)
+        .With("autoproxy_member", AutoproxyMember)
+        .With("last_latch_timestamp", LastLatchTimestamp)
+    );
+}