Moved TOTP codes out of the main users table.

database/2025_02_08_000526_create_users_totp_table.php

@@ -0,0 +1,33 @@
+<?php
+use Index\Base32;
+use Index\Db\DbConnection;
+use Index\Db\Migration\DbMigration;
+
+final class CreateUsersTotpTable_20250208_000526 implements DbMigration {
+    public function migrate(DbConnection $conn): void {
+        $conn->execute(<<<SQL
+            CREATE TABLE msz_users_totp (
+                user_id      INT UNSIGNED NOT NULL,
+                totp_secret  BINARY(16)   NOT NULL,
+                totp_created TIMESTAMP    NOT NULL DEFAULT NOW(),
+                PRIMARY KEY (user_id),
+                INDEX users_totp_created_index (totp_created),
+                CONSTRAINT users_totp_users_foreign
+                    FOREIGN KEY (user_id)
+                    REFERENCES msz_users (user_id)
+                    ON UPDATE CASCADE
+                    ON DELETE CASCADE
+            ) COLLATE='utf8mb4_bin';
+        SQL);
+
+        $result = $conn->query('SELECT user_id, user_totp_key FROM msz_users WHERE user_totp_key IS NOT NULL');
+        $stmt = $conn->prepare('INSERT INTO msz_users_totp (user_id, totp_secret) VALUES (?, ?)');
+        while($result->next()) {
+            $stmt->addParameter(1, $result->getString(0));
+            $stmt->addParameter(2, Base32::decode($result->getString(1)));
+            $stmt->execute();
+        }
+
+        $conn->execute('ALTER TABLE msz_users DROP COLUMN user_totp_key');
+    }
+}