feat(documents) : add migration for type column with data classification

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

migrations/Version20260323141052.php

@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20260323141052 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Add type column to documents table and classify existing documents by mimeType';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql("DO \$\$ BEGIN IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'documents' AND column_name = 'type') THEN ALTER TABLE documents ADD COLUMN type VARCHAR(20) NOT NULL DEFAULT 'documentation'; END IF; END \$\$");
+        $this->addSql("UPDATE documents SET type = 'photo' WHERE mimetype LIKE 'image/%'");
+        $this->addSql("UPDATE documents SET type = 'autre' WHERE type = 'documentation' AND mimetype NOT LIKE 'application/pdf' AND mimetype NOT LIKE 'image/%'");
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE documents DROP COLUMN IF EXISTS type');
+    }
+}