v0.7.1
Isolate DB backups per WordPress install:
- Scope database backup storage to a site-specific directory derived from the host, install path, and path hash so multiple WordPress installs that share one parent folder do not list, delete, or restore each other's backups.
- Remove legacy shared backup lookup, update maintenance tests for the new site-scoped behavior, and document follow-up security hardening tasks for object-cache deserialization and DB backup integrity checks.