feat(project-management) : add timestampable/blamable to Task and Project (additive)

Tranche 3 of LST-65. Task and Project adopt TimestampableBlamableTrait.

- Additive migration on task and project: created_at/updated_at (nullable),
  created_by/updated_by (nullable INT, FK to "user" ON DELETE SET NULL) +
  indexes + COMMENT ON COLUMN. down() drops only the added objects.
- Trait fields stay out of the existing API groups (trait carries its own).
- Functional test (TaskTimestampableTest) confirms created_at on persist and
  updated_at refresh on update.

161 tests green, no destructive migration.

src/Module/ProjectManagement/Domain/Entity/Project.php

@@ -16,8 +16,11 @@ use ApiPlatform\Metadata\Post;
 use App\Module\ProjectManagement\Infrastructure\ApiPlatform\Resource\SwitchWorkflowOutput;
 use App\Module\ProjectManagement\Infrastructure\ApiPlatform\State\SwitchProjectWorkflowProcessor;
 use App\Module\ProjectManagement\Infrastructure\Doctrine\DoctrineProjectRepository;
+use App\Shared\Domain\Contract\BlamableInterface;
 use App\Shared\Domain\Contract\ClientInterface;
 use App\Shared\Domain\Contract\ProjectInterface;
+use App\Shared\Domain\Contract\TimestampableInterface;
+use App\Shared\Domain\Trait\TimestampableBlamableTrait;
 use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
@@ -56,8 +59,10 @@ use Symfony\Component\Validator\Constraints as Assert;
 #[ApiFilter(BooleanFilter::class, properties: ['archived'])]
 #[ORM\Entity(repositoryClass: DoctrineProjectRepository::class)]
 #[UniqueEntity(fields: ['code'], message: 'Ce code de projet est déjà utilisé.')]
-class Project implements ProjectInterface
+class Project implements ProjectInterface, TimestampableInterface, BlamableInterface
 {
+    use TimestampableBlamableTrait;
+
     #[ORM\Id]
     #[ORM\GeneratedValue]
     #[ORM\Column]

src/Module/ProjectManagement/Domain/Entity/Task.php

@@ -18,8 +18,11 @@ use ApiPlatform\Metadata\Post;
 use App\Module\ProjectManagement\Infrastructure\ApiPlatform\State\TaskCalendarProcessor;
 use App\Module\ProjectManagement\Infrastructure\ApiPlatform\State\TaskNumberProcessor;
 use App\Module\ProjectManagement\Infrastructure\Doctrine\DoctrineTaskRepository;
+use App\Shared\Domain\Contract\BlamableInterface;
 use App\Shared\Domain\Contract\TaskInterface;
+use App\Shared\Domain\Contract\TimestampableInterface;
 use App\Shared\Domain\Contract\UserInterface;
+use App\Shared\Domain\Trait\TimestampableBlamableTrait;
 use DateTimeImmutable;
 use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
@@ -47,8 +50,10 @@ use Symfony\Component\Validator\Context\ExecutionContextInterface;
 #[ORM\Entity(repositoryClass: DoctrineTaskRepository::class)]
 #[ORM\Table(name: 'task')]
 #[ORM\UniqueConstraint(name: 'uniq_task_project_number', columns: ['project_id', 'number'])]
-class Task implements TaskInterface
+class Task implements TaskInterface, TimestampableInterface, BlamableInterface
 {
+    use TimestampableBlamableTrait;
+
     #[ORM\Id]
     #[ORM\GeneratedValue]
     #[ORM\Column]