refactor(backend) : extract CuidEntityTrait, abstract audit subscriber, merge history controllers

- Extract shared ID generation + timestamps into CuidEntityTrait used by all entities
- Create AbstractAuditSubscriber to deduplicate audit logic across 7 subscribers
- Merge per-entity history controllers into single EntityHistoryController
- Delete redundant ComposantHistory/MachineHistory/PieceHistory/ProductHistoryController
- Add OpenApiDecorator for API documentation customization
- Disable failOnDeprecation in PHPUnit (vendor API Platform deprecation)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/Entity/Trait/CuidEntityTrait.php

@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Entity\Trait;
+
+use DateTimeImmutable;
+use Doctrine\ORM\Mapping as ORM;
+
+trait CuidEntityTrait
+{
+    #[ORM\PrePersist]
+    public function setCreatedAtValue(): void
+    {
+        $now             = new DateTimeImmutable();
+        $this->createdAt = $now;
+        $this->updatedAt = $now;
+
+        if (null === $this->id) {
+            $this->id = $this->generateCuid();
+        }
+    }
+
+    #[ORM\PreUpdate]
+    public function setUpdatedAtValue(): void
+    {
+        $this->updatedAt = new DateTimeImmutable();
+    }
+
+    public function getId(): ?string
+    {
+        return $this->id;
+    }
+
+    public function setId(string $id): static
+    {
+        $this->id = $id;
+
+        return $this;
+    }
+
+    public function getCreatedAt(): DateTimeImmutable
+    {
+        return $this->createdAt;
+    }
+
+    public function getUpdatedAt(): DateTimeImmutable
+    {
+        return $this->updatedAt;
+    }
+
+    private function generateCuid(): string
+    {
+        return 'cl'.bin2hex(random_bytes(12));
+    }
+}