Small tool update to support fetching the service discovery URL
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## Summary by CodeRabbit
* **New Features**
* Added a `-command` flag to enable a new operation mode; when set to
`adue` the CLI performs the account-driven enrollment discovery flow,
otherwise it falls back to the existing account detail behavior.
* **Chores**
* Simplified the server private key flag to `-key`.
* Strengthened input validation to require both `-key` and `-org-name`.
* Enforced mutual exclusivity among operation flags (`-profile-uuid`,
`-serial-number`, `-command`).
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Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
