feat: alternate proxy switch mode "add"

PluralKit.Core/Database/Functions/MessageContext.cs

@@ -33,6 +33,6 @@ public class MessageContext
     public int? LatchTimeout { get; }
     public bool CaseSensitiveProxyTags { get; }
     public bool ProxyErrorMessageEnabled { get; }
-    public bool ProxySwitch { get; }
+    public SystemConfig.ProxySwitchAction ProxySwitch { get; }
     public bool DenyBotUsage { get; }
 }

PluralKit.Core/Database/Functions/functions.sql

@@ -9,7 +9,7 @@ create function message_context(account_id bigint, guild_id bigint, channel_id b
         latch_timeout integer,
         case_sensitive_proxy_tags bool,
         proxy_error_message_enabled bool,
-        proxy_switch bool,
+        proxy_switch int,
         name_format text,
 
         tag_enabled bool,

PluralKit.Core/Database/Migrations/49.sql

@@ -0,0 +1,11 @@
+-- database version 49
+-- change proxy switch config to an enum
+
+alter table system_config 
+    alter column proxy_switch drop default,
+    alter column proxy_switch type int
+        using case when proxy_switch then 1 else 0 end,
+    alter column proxy_switch set default 0,
+    add constraint proxy_switch_check check (proxy_switch = ANY (ARRAY[0,1,2]));
+
+update info set schema_version = 49;

PluralKit.Core/Database/Utils/DatabaseMigrator.cs

@@ -9,7 +9,7 @@ namespace PluralKit.Core;
 internal class DatabaseMigrator
 {
     private const string RootPath = "PluralKit.Core.Database"; // "resource path" root for SQL files
-    private const int TargetSchemaVersion = 48;
+    private const int TargetSchemaVersion = 49;
     private readonly ILogger _logger;
 
     public DatabaseMigrator(ILogger logger)