Too many refactors in one:

- Allowed adding ephemeral(ish) views and functions
- Moved message_count to a concrete database field
- Moved most proxy logic to a stored procedure
- Moved database files around and refactored schema manager

PluralKit.Core/Database/ProxyMember.cs

@@ -0,0 +1,26 @@
+#nullable enable
+using System.Collections.Generic;
+
+namespace PluralKit.Core
+{
+    /// <summary>
+    /// Model for the `proxy_info` PL/pgSQL function in `functions.sql`
+    /// </summary>
+    public class ProxyMember
+    {
+        public int SystemId { get; set; }
+        public int MemberId { get; set; }
+        public bool ProxyEnabled { get; set; }
+        public AutoproxyMode AutoproxyMode { get; set; }
+        public bool IsAutoproxyMember { get; set; }
+        public ulong? LatchMessage { get; set; }
+        public string ProxyName { get; set; } = "";
+        public string? ProxyAvatar { get; set; }
+        public IReadOnlyCollection<ProxyTag> ProxyTags { get; set; } = new ProxyTag[0];
+        public bool KeepProxy { get; set; }
+        
+        public IReadOnlyCollection<ulong> ChannelBlacklist { get; set; } = new ulong[0];
+        public IReadOnlyCollection<ulong> LogBlacklist { get; set; } = new ulong[0];
+        public ulong? LogChannel { get; set; }
+    }
+}