[BUG]: pob.get_public_key fails

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current behavior

When calling the get_public_key with producer address as input, you receive the following error

`pob.get_public_key 1NsQbH5AhQXgtSNg1ejpFqTi2hmCWz1eQS
illegal base64 data at input byte 0`

### Expected behavior

_No response_

### Steps to reproduce

_No response_

### Environment

```markdown
- OS:
```

### Anything else?

_No response_

Start by reproducing the failure reported for pob.get_public_key with the producer address shown in the issue, then trace that command's public-key input handling. Confirm how producer addresses are expected to be decoded and verify the command succeeds without the reported base64 error.

Written by the indexing model from the issue text.