feat: ajout du prix au kilo et de l'age moyen bovin + feed bovin via xlsx (!50)

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## Description de la PR

## Modification du .env

## Check list

- [ ] Pas de régression
- [x] TU/TI/TF rédigée
- [ ] TU/TI/TF OK
- [ ] CHANGELOG modifié

Reviewed-on: #50
Co-authored-by: tristan <tristan@yuno.malio.fr>
Co-committed-by: tristan <tristan@yuno.malio.fr>

src/Repository/BovineRepository.php

@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Repository;
+
+use App\Entity\Bovine;
+use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
+use Doctrine\Persistence\ManagerRegistry;
+
+/**
+ * @extends ServiceEntityRepository<Bovine>
+ */
+final class BovineRepository extends ServiceEntityRepository
+{
+    public function __construct(ManagerRegistry $registry)
+    {
+        parent::__construct($registry, Bovine::class);
+    }
+
+    /**
+     * Compteurs des bovins actifs par tranche d'âge.
+     *
+     * @return array{total: int, over24: int, between22And24: int, between20And22: int}
+     */
+    public function getInventoryStats(?int $buildingCaseId = null): array
+    {
+        $qb = $this->createQueryBuilder('b')
+            ->select(
+                'COUNT(b.id) AS total',
+                'SUM(CASE WHEN b.ageMonths >= 24 THEN 1 ELSE 0 END) AS over24',
+                'SUM(CASE WHEN b.ageMonths >= 22 AND b.ageMonths < 24 THEN 1 ELSE 0 END) AS between22And24',
+                'SUM(CASE WHEN b.ageMonths >= 20 AND b.ageMonths < 22 THEN 1 ELSE 0 END) AS between20And22',
+            )
+            ->where('b.exitedAt IS NULL')
+        ;
+
+        if (null !== $buildingCaseId) {
+            $qb->andWhere('b.buildingCase = :caseId')
+                ->setParameter('caseId', $buildingCaseId)
+            ;
+        }
+
+        $row = $qb->getQuery()->getSingleResult();
+
+        return [
+            'total'          => (int) ($row['total'] ?? 0),
+            'over24'         => (int) ($row['over24'] ?? 0),
+            'between22And24' => (int) ($row['between22And24'] ?? 0),
+            'between20And22' => (int) ($row['between20And22'] ?? 0),
+        ];
+    }
+}