Add father/mother links to NPCs, derived from the relationships text

- Npc gains self-referencing father/mother (nullable, ON DELETE SET NULL);
  editable as dropdowns on the per-NPC form
- app:npc:link-parents parses "son/daughter/child of X [and Y]" from the
  Relationships / Notes column, resolves the names within the same family,
  and works out which parent is father vs mother from husband/wife/widow(er)
  and son/daughter/sister/brother cues (plus a small name-gender table for
  the few the text can't disambiguate). --dry-run / --force. 92/180 linked,
  none ambiguous.
- migrations now pin ENGINE=InnoDB - the local WAMP MariaDB defaults to
  MyISAM, which silently drops foreign keys

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/Form/NpcType.php

@@ -7,6 +7,8 @@ use App\Enum\BloodCartInvolvement;
 use App\Enum\MysteryImportance;
 use App\Enum\Race;
 use App\Enum\VillageStatus;
+use App\Repository\NpcRepository;
+use Symfony\Bridge\Doctrine\Form\Type\EntityType;
 use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Form\Extension\Core\Type\EnumType;
 use Symfony\Component\Form\Extension\Core\Type\IntegerType;
@@ -34,7 +36,19 @@ class NpcType extends AbstractType
                 'required' => false,
                 'label' => 'Relationships / Notes',
                 'attr' => ['rows' => 3],
-            ])
+            ]);
+
+        $parent = [
+            'class' => Npc::class,
+            'required' => false,
+            'placeholder' => '— unknown —',
+            'choice_label' => static fn (Npc $n) => sprintf('%s (%s)', $n->getName(), $n->getFamily()),
+            'query_builder' => static fn (NpcRepository $r) => $r->createQueryBuilder('n')
+                ->orderBy('n.family', 'ASC')->addOrderBy('n.name', 'ASC'),
+        ];
+        $builder
+            ->add('father', EntityType::class, $parent)
+            ->add('mother', EntityType::class, $parent)
             ->add('villageStatus', EnumType::class, $enum(VillageStatus::class))
             ->add('bloodCartInvolvement', EnumType::class, $enum(BloodCartInvolvement::class))
             ->add('mysteryImportance', EnumType::class, $enum(MysteryImportance::class))