Lemmy PostgreSQL backup pg_dump, compressed, excluded activity tables

# "this is the most flexible output format in that it allows manual selection and reordering of archived items during restore. This format is also compressed by default."
sudo -iu postgres pg_dump --format=custom --compress=5 \
   --exclude-table-data "*.received_activity" \
   --exclude-table-data "*.sent_activity" \
   lemmy > 2023-08-10_backup_compress_1.dump