Fixing recurring maintenance start (again) (#5914)

Co-authored-by: Frank Elsinga <frank@elsinga.de>

db/knex_migrations/2025-06-13-0000-maintenance-add-last-start.js

@@ -0,0 +1,34 @@
+// Add column last_start_date to maintenance table
+exports.up = async function (knex) {
+    await knex.schema
+        .alterTable("maintenance", function (table) {
+            table.datetime("last_start_date");
+        });
+
+    // Perform migration for recurring-interval strategy
+    const recurringMaintenances = await knex("maintenance").where({
+        strategy: "recurring-interval",
+        cron: "* * * * *"
+    }).select("id", "start_time");
+
+    // eslint-disable-next-line camelcase
+    const maintenanceUpdates = recurringMaintenances.map(async ({ start_time, id }) => {
+        // eslint-disable-next-line camelcase
+        const [ hourStr, minuteStr ] = start_time.split(":");
+        const hour = parseInt(hourStr, 10);
+        const minute = parseInt(minuteStr, 10);
+
+        const cron = `${minute} ${hour} * * *`;
+
+        await knex("maintenance")
+            .where({ id })
+            .update({ cron });
+    });
+    await Promise.all(maintenanceUpdates);
+};
+
+exports.down = function (knex) {
+    return knex.schema.alterTable("maintenance", function (table) {
+        table.dropColumn("last_start_date");
+    });
+};