feat(books-backup): cover bookva-* tenant (db/mongo/minio)

bookva tenant (bookva-db/mongo/es/minio) поднят 26.05 при cutover-prep, а
books-vds backup написан 25.05 — до bookva. Покрытие не расширили; gap висел
wiki-follow-up #2 ~2.5 недели. Тот же класс, что MSSQL: новый stateful, бэкап
отстал, повешен как заметка.

Добавлено в scripts/books-vds-backup-daily-kreknin/run.sh (deploy == repo,
бэкап .bak-pre-bookva):
- bookva-db: mariadb-dump (тот же BOOKS_DB_ROOT_PASSWORD, стек клонирован)
- bookva-mongo: mongodump --archive (no-auth)
- bookva-minio: raw rsync named volume bookva-minio-data (immutable objects)

Каждая команда протестирована изолированно ДО внесения в скрипт. Verified
зелёным прогоном: BOOKS-VDS backup OK 10m42s, артефакты на kreknin
(bookva-mariadb 257M, bookva-mongo 3.2M, bookva-minio 1.4G).

bookva-es отложен (path.repo не сконфигурирован, нужен ES restart через
Portainer) -> .tasks/bookva-es-snapshot-repo.md. Покрыт по факту: индексы
epz/products идентичны slovo ES, который снапшотится.

- .wiki/entities/books-vds.md: Backup-секция + follow-up #2 частично закрыт
- .wiki/concepts/backup-inventory-2026-06.md: bookva row -> done
- .tasks/bookva-es-snapshot-repo.md: backlog для ES-снапшота

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

scripts/books-vds-backup-daily-kreknin/run.sh

@@ -119,6 +119,17 @@ docker exec books-job-scheduler-mongo mongodump --archive --quiet 2>/dev/null \
   | gzip > "$DUMP_DIR/job-scheduler-mongo.archive.gz"
 echo "job-scheduler-mongo: $(stat -c %s "$DUMP_DIR/job-scheduler-mongo.archive.gz") bytes"
 
+# bookva tenant (separate cloned stack): bookva-db shares BOOKS_DB_ROOT_PASSWORD;
+# bookva-mongo is no-auth. Containers are named volumes (not bind paths) → logical dumps.
+docker exec bookva-db mariadb-dump -uroot -p"$BOOKS_DB_ROOT_PASSWORD" \
+  --all-databases --single-transaction --quick 2>/dev/null \
+  | gzip > "$DUMP_DIR/bookva-mariadb.sql.gz"
+echo "bookva-db (mariadb): $(stat -c %s "$DUMP_DIR/bookva-mariadb.sql.gz") bytes"
+
+docker exec bookva-mongo mongodump --archive --quiet 2>/dev/null \
+  | gzip > "$DUMP_DIR/bookva-mongo.archive.gz"
+echo "bookva-mongo: $(stat -c %s "$DUMP_DIR/bookva-mongo.archive.gz") bytes"
+
 # === Step 2: ES snapshot via REST ===
 echo "--- ES snapshot daily-$TODAY in repo $ES_SNAPSHOT_REPO ---"
 ES_SNAP="daily-$TODAY"
@@ -163,6 +174,7 @@ rsync -aHh --info=stats2 --delete $LINK_DEST_ARG \
   /opt/books \
   /usr/docker/elasticsearch/snapshots \
   /usr/docker/minio/data \
+  /var/lib/docker/volumes/bookva-minio-data \
   /usr/docker/traefik/letsencrypt \
   /usr/docker/traefik/data \
   /etc/ssh \
@@ -206,8 +218,9 @@ Components:
 - /usr/docker/{minio/data, elasticsearch/snapshots, traefik/{letsencrypt,data}}
 - /etc/{ssh,hosts,cron.d}
 - /root/.ssh
-- DB dumps: books-db (mariadb), mongo (shared), books-job-scheduler-mongo
-- ES snapshot: $ES_SNAP
+- DB dumps: books-db (mariadb), mongo (shared), books-job-scheduler-mongo, bookva-db (mariadb), bookva-mongo
+- bookva-minio: raw volume (bookva-minio-data)
+- ES snapshot (slovo): $ES_SNAP  [bookva-es: derivative index == slovo, snapshot pending Portainer path.repo]
 
 Log: $LOG"
 email_send "[$HOST_LABEL] backup OK $TODAY" "$EMAIL_BODY"