* feat(iam): add set-password and enforce-hashing CLI commands
Adds two new top-level IAM commands:
- `hanzo iam set-password USER` — directly set/reset a user's password
via the /api/set-password endpoint (server-side argon2id hashing)
- `hanzo iam enforce-hashing` — set org passwordType to argon2id and
audit all users for plaintext passwords
* style: format iam.py with black line-length rules
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Co-authored-by: Hanzo Dev <[email protected]>
