feat: Expose a way to set `trailing_stop_info`

[vpereira]

Problem or use case

the broker's own order schema carries a trailing_stop_info field, so the backend models trailing stops natively. However the CLI exposes no way to set one.

Proposed solution

Expose a way to set trailing_stop_info via UI

Alternatives considered

No response

Relevant command or workflow

No response

User impact

Important for a specific workflow

Checklist

• I have searched existing issues.
• This is a CLI feature request, not an account/support request.
• I understand this repository is source-available and does not accept external PRs.