Migrated to bitflags

server/migrations/001_create_members.sql

@@ -4,7 +4,7 @@ CREATE TABLE "members" (
   full_name           text        NOT NULL,
   registration_token  text        NOT NULL UNIQUE,
   diploma             text,
-  hours               text[]      NOT NULL,
-  groups              text[]      NOT NULL
+  swim_groups         bigint      NOT NULL,
+  groups              bigint      NOT NULL
 );