fix(backups): показать отсутствие файлов и защитить удаление записей

backend/package.json

@@ -27,7 +27,7 @@
     "test:config-sync": "tsx src/utils/server-id.test.ts && tsx src/services/config-apply-plan.test.ts && tsx src/services/entity-snapshots.test.ts && tsx src/services/gre-native-identity.test.ts && tsx src/services/gre-ipv6.test.ts && tsx src/routes/gre-ipv6-validation.test.ts && tsx src/services/network-disabled-server.test.ts",
     "test:ros-file": "tsx src/services/ros-file-contents.test.ts && tsx src/services/mikrotik-response.test.ts",
     "test:scheduler": "tsx src/services/scheduler-running.test.ts && tsx src/services/scheduler-recorded-run.test.ts && tsx src/routes/scheduler.test.ts",
-    "test:backups": "tsx src/services/router-config-export.test.ts && tsx src/services/backup-scheduler-run.test.ts && tsx src/services/backup-restore.test.ts && tsx src/services/backup-deletion.test.ts && tsx src/services/backup-dto.test.ts && tsx src/services/backup-storage-update.test.ts && tsx src/services/backup-job-execution.test.ts && tsx src/routes/backups-operations.test.ts && tsx src/services/s3-backup-client.test.ts",
+    "test:backups": "tsx src/services/backup-local-file-state.test.ts && tsx src/services/router-config-export.test.ts && tsx src/services/backup-scheduler-run.test.ts && tsx src/services/backup-restore.test.ts && tsx src/services/backup-deletion.test.ts && tsx src/services/backup-dto.test.ts && tsx src/services/backup-storage-update.test.ts && tsx src/services/backup-job-execution.test.ts && tsx src/routes/backups-operations.test.ts && tsx src/services/s3-backup-client.test.ts",
     "test:ipsec": "tsx src/services/ipsec-config.test.ts && tsx src/services/ipsec-state.test.ts && tsx src/routes/ipsec-history.test.ts && tsx src/services/ipsec-restore.test.ts && tsx src/services/ipsec-operation.test.ts && tsx src/routes/ipsec-mutation.test.ts && tsx src/routes/ipsec-nat.test.ts && tsx src/routes/ipsec-group.test.ts",
     "test:live-maps": "tsx src/services/gre-keepalive.test.ts && tsx src/services/gre-read.test.ts && tsx src/services/ospf-route-parse.test.ts && tsx src/services/vxlan-live.test.ts && tsx src/routes/vxlan.test.ts && tsx src/services/containers-live.test.ts && tsx src/services/firewall-poll.test.ts && tsx src/services/gre-catalog-poll.test.ts && tsx src/routes/filters-gre-catalog.test.ts && tsx src/routes/bgp-catalog.test.ts && tsx src/services/bgp-catalog-parse.test.ts && tsx src/routes/ospf-catalog.test.ts && tsx src/services/ospf-observed-values.test.ts && tsx src/routes/ospf-legacy.test.ts",
     "test": "node scripts/test.mjs",