feat(security): helmet + rate limit + env hardening — 8.3

backend/prisma/seed.ts

@@ -66,8 +66,7 @@ async function main() {
       onboardedAt: new Date(),
     },
   });
-  // TODO(phase7): 프로덕션 seed 에서는 평문 비밀번호 stdout 출력 제거
-  console.log(`  user: ${user.email} (id=${user.id}) password=${DEMO_PASSWORD}`);
+  console.log(`  user: ${user.email} (id=${user.id})`);
 
   for (const s of SUBJECTS) {
     const subject = await prisma.subject.upsert({