Fixed missing column values for default paid tiers

fixes https://github.com/TryGhost/Toolbox/issues/455
refs https://github.com/TryGhost/Ghost/blob/main/ghost/core/core/server/data/migrations/versions/5.19/2022-09-02-20-52-backfill-new-product-columns.js

- the referenced migration does not handle backfilling the
  currency/monthly_price/yearly_price for the default paid tiers where
  they do not originate from Stripe
- this is causing issues in Ghost because of the missing data
- this migration backfills the columns for products where they are paid
  but do not currently contain values due to the bug above with the
  values for the default tier we usually use

ghost/core/core/server/data/migrations/versions/5.21/2022-10-25-12-05-backfill-missed-products-columns.js

@@ -0,0 +1,35 @@
+const logging = require('@tryghost/logging');
+const {createTransactionalMigration} = require('../../utils');
+
+module.exports = createTransactionalMigration(
+    async function up(knex) {
+        logging.info(`Fixing currency/monthly_price/yearly_price values for default paid tiers`);
+
+        const currencyUpdated = await knex('products')
+            .update('currency', 'usd')
+            .where({
+                currency: null,
+                type: 'paid'
+            });
+        logging.info(`Updated ${currencyUpdated} tier(s) where currency=null, type=paid to currency=USD`);
+
+        const monthlyPriceUpdated = await knex('products')
+            .update('monthly_price', 500)
+            .where({
+                monthly_price: null,
+                type: 'paid'
+            });
+        logging.info(`Updated ${monthlyPriceUpdated} tier(s) where monthly_price=null, type=paid to monthly_price=500`);
+
+        const yearlyPriceUpdated = await knex('products')
+            .update('yearly_price', 5000)
+            .where({
+                yearly_price: null,
+                type: 'paid'
+            });
+        logging.info(`Updated ${yearlyPriceUpdated} tier(s) where yearly_price=null, type=paid to yearly_price=5000`);
+    },
+    async function down(/* knex */) {
+        // no-op: we don't want to revert to bad data
+    }
+);