feat: add email for notifications to household members

migrations/000009.php

@@ -0,0 +1,11 @@
+<?php
+// This migration adds an "email" column to the members table.
+// It allows the household member to receive notifications when their subscriptions are about to expire.
+
+/** @noinspection PhpUndefinedVariableInspection */
+$columnQuery = $db->query("SELECT * FROM pragma_table_info('household') where name='email'");
+$columnRequired = $columnQuery->fetchArray(SQLITE3_ASSOC) === false;
+
+if ($columnRequired) {
+    $db->exec('ALTER TABLE household ADD COLUMN email TEXT DEFAULT ""');
+}