limit_check_lock (#287)

controller/store/sql/postgresql/023_v0_4_31_limit_check_locks.sql

@@ -0,0 +1,7 @@
+-- +migrate Up
+
+create table limit_check_locks (
+    id                  serial                  primary key,
+    account_id          integer                 not null references accounts (id),
+    updated_at          timestamptz             not null default(current_timestamp)
+);