Add the messages table to database.

database_setup/database.sql

@@ -46,4 +46,9 @@ CREATE TABLE ParticipationPoints (
     DiscordMember boolean not null,
     Points int unsigned DEFAULT 0,
     PRIMARY KEY (Cycle, UserId)
+);
+
+CREATE TABLE Messages (
+    FileName varchar(100) PRIMARY KEY,
+    MessageId bigint unsigned not null
 );