embabel reset-password

Forgot the password. Recreates the operator account and keeps every byte of data — the account lives in two small files under the volume’s admin directory, and this deletes exactly those two. The appliance refuses to reopen setup over its API by design, permanently; whoever controls Docker on the host already has this authority, which is why it is sound rather than a back door.

Was previously reachable only as setup.py --reset-password, so someone locked out had to know to go around the CLI.