feat: door access codes display and admin crud

migrations/Version20260925120000.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20260925120000 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Adds the access codes for doors, the lift and the barrier';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // No unique key: rotating a code means a second row for the same door, kept apart by
+        // valid_from. The index is on that, since every read orders by it.
+        $this->addSql('CREATE TABLE access_code (id INT AUTO_INCREMENT NOT NULL, label VARCHAR(50) NOT NULL, code VARCHAR(32) NOT NULL, valid_from DATE NOT NULL, description VARCHAR(255) DEFAULT NULL, visibility VARCHAR(20) NOT NULL, INDEX idx_access_code_valid_from (valid_from), PRIMARY KEY (id)) DEFAULT CHARACTER SET utf8mb4');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('DROP TABLE access_code');
+    }
+}