refactor(api) : remove TypeMachine skeleton system, fix ModelType serialization

- Remove TypeMachine, TypeMachineComponentRequirement, TypeMachinePieceRequirement,
  TypeMachineProductRequirement entities and related repositories/state processor
- Replace MachineSkeletonController with MachineStructureController
- Link CustomField directly to Machine instead of TypeMachine
- Add migration to drop TypeMachine tables and migrate custom fields to machines
- Fix ModelType serialization: Annotation\Groups → Attribute\Groups (Symfony 8 compat)
  and add product:read, composant:read, piece:read groups for embedded category display
- Fix Profile: same Annotation → Attribute import
- Fix SearchFilter: partial → ipartial on Comment and Document
- Update frontend submodule (remove skeleton pages/components, simplify machine creation)

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

src/EventSubscriber/MachineAuditSubscriber.php

@@ -11,7 +11,6 @@ use App\Entity\ModelType;
 use App\Entity\Product;
 use App\Entity\Profile;
 use App\Entity\Site;
-use App\Entity\TypeMachine;
 use DateTimeInterface;
 use Doctrine\Bundle\DoctrineBundle\Attribute\AsDoctrineListener;
 use Doctrine\Common\Collections\Collection;
@@ -286,7 +285,6 @@ final class MachineAuditSubscriber implements EventSubscriber
             'reference'       => $machine->getReference(),
             'prix'            => $machine->getPrix(),
             'site'            => $this->normalizeValue($machine->getSite()),
-            'typeMachine'     => $this->normalizeValue($machine->getTypeMachine()),
             'constructeurIds' => $this->normalizeCollection($machine->getConstructeurs()),
         ];
     }
@@ -335,13 +333,6 @@ final class MachineAuditSubscriber implements EventSubscriber
             ];
         }
 
-        if ($value instanceof TypeMachine) {
-            return [
-                'id'   => $value->getId(),
-                'name' => $value->getName(),
-            ];
-        }
-
         if ($value instanceof ModelType) {
             return [
                 'id'   => $value->getId(),