Initialize last_reconciled from transactions

postgres/schema/0018_reconciled-on.sql

@@ -1,5 +1,12 @@
 -- +goose Up
 ALTER TABLE accounts ADD COLUMN last_reconciled date NULL;
+UPDATE accounts
+SET last_reconciled = (
+    SELECT MAX(transactions.date)
+    FROM transactions
+    WHERE transactions.account_id = accounts.id
+    AND transactions.status = 'Reconciled'
+);
 
 -- +goose Down
 ALTER TABLE accounts DROP COLUMN last_reconciled;