WS-547 & WS-548: restore capability and workflow

.../cli/executables/pexable/casa_envoy/casa_envoy/auditor.py

...i/executables/pexable/casa_envoy/casa_envoy/foundation.py

...i/executables/pexable/casa_envoy/casa_envoy/interfaces.py

...li/executables/pexable/casa_envoy/casa_envoy/launchers.py

.../cli/executables/pexable/casa_envoy/casa_envoy/palaver.py

apps/cli/executables/pexable/casa_envoy/test/restore.json

apps/cli/executables/pexable/casa_envoy/test/test_auditor.py

...li/executables/pexable/casa_envoy/test/test_casa_envoy.py

...li/executables/pexable/casa_envoy/test/test_foundation.py

schema/versions/7200d0d19938_add_restore_capability.py