feat : ajout d'un champ commentaire sur les contrats + correction de plusieurs bugs

migrations/Version20260306160000.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20260306160000 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Add comment column to employee_contract_periods table.';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE employee_contract_periods ADD COLUMN comment TEXT DEFAULT NULL');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE employee_contract_periods DROP COLUMN comment');
+    }
+}