conductor whoami fails on OSS with 'no authentication configured'

[nthmost-orkes]

Problem

Running `conductor whoami` against a local OSS server returns an error:

```
Error: no authentication configured - please configure auth-token or auth-key/auth-secret
```

OSS Conductor has no authentication — this is by design. The command should either work without credentials on OSS (showing server URL, version, server type) or detect that the server is OSS and display a helpful message instead of an error.

As it stands, a new user who tries `conductor whoami` to confirm their setup is working gets an error that implies something is broken, when nothing is wrong.

Fix

• Detect OSS server type and skip auth check
• Return useful info: server URL, server version, server type

Affects

• `conductor-oss/conductor-cli`

[nthmost-orkes]

Fixed in conductor-oss/conductor-cli#78 (merged). conductor whoami on OSS Conductor (no auth configured) now shows:\n\nServer: http://localhost:8080/api\nAuthentication: none (OSS Conductor)\n\nInstead of erroring out.