feat(auth): add profile and QR card identification endpoints

eme-backend/src/repositories/carte-etudiante.repository.ts

@@ -0,0 +1,13 @@
+import { Prisma } from '@prisma/client';
+import { prisma } from '../db/prisma';
+
+export type CarteAvecUtilisateur = Prisma.CarteEtudianteGetPayload<{
+  include: { utilisateur: { include: { role: true; campus: true } } };
+}>;
+
+export function findByQrCode(qrCode: string): Promise<CarteAvecUtilisateur | null> {
+  return prisma.carteEtudiante.findFirst({
+    where: { qrCode },
+    include: { utilisateur: { include: { role: true, campus: true } } },
+  });
+}