1-3131: db migration to make potentially stale non-nullable

This change adds a db migration to make the potentially_stale column
non-nullable. It'll set any NULL values to `false`.

In the down-migration, make the column nullable again.

src/migrations/20241119103819-make-potentially-stale-non-nullable.js

@@ -0,0 +1,21 @@
+'use strict';
+
+exports.up = function (db, cb) {
+    db.runSql(
+        `
+        UPDATE features SET potentially_stale = FALSE WHERE potentially_stale IS NULL;
+        ALTER TABLE features ALTER COLUMN potentially_stale SET NOT NULL;
+        `,
+        cb,
+    );
+};
+
+exports.down = function (db, cb) {
+    db.runSql(
+        `
+        ALTER TABLE features ALTER COLUMN potentially_stale DROP NOT NULL;
+        `,
+        cb,
+    );
+};
+