Add disabling autoproxy per-account

PluralKit.Core/Database/Functions/MessageContext.cs

@@ -24,5 +24,6 @@ namespace PluralKit.Core
         public Instant? LastSwitchTimestamp { get; }
         public string? SystemTag { get; }
         public string? SystemAvatar { get; }
+        public bool AllowAutoproxy { get; }
     }
 }

PluralKit.Core/Database/Functions/functions.sql

@@ -14,12 +14,13 @@
         last_switch_members int[],
         last_switch_timestamp timestamp,
         system_tag text,
-        system_avatar text
+        system_avatar text,
+        allow_autoproxy bool
     )
 as $$
     -- CTEs to query "static" (accessible only through args) data
     with
-        system as (select systems.* from accounts inner join systems on systems.id = accounts.system where accounts.uid = account_id),
+        system as (select systems.*, allow_autoproxy as account_autoproxy from accounts inner join systems on systems.id = accounts.system where accounts.uid = account_id),
         guild as (select * from servers where id = guild_id),
         last_message as (select * from messages where messages.guild = guild_id and messages.sender = account_id order by mid desc limit 1)
     select
@@ -37,7 +38,8 @@ as $$
         system_last_switch.members as last_switch_members,
         system_last_switch.timestamp as last_switch_timestamp,
         system.tag as system_tag,
-        system.avatar_url as system_avatar
+        system.avatar_url as system_avatar,
+        system.account_autoproxy as allow_autoproxy
     -- We need a "from" clause, so we just use some bogus data that's always present
     -- This ensure we always have exactly one row going forward, so we can left join afterwards and still get data
     from (select 1) as _placeholder