Module issue 

GitHub Issue helpers using the gh CLI.

Responsibilities:

• Create and edit GitHub issues for Ralph tasks via gh issue.
• Parse issue URLs/numbers from gh output for persistence.

Not handled here:

• Queue mutation or task persistence.
• Rendering issue bodies from tasks (see cli::queue::export).

Invariants/assumptions:

• gh is installed and authenticated.
• Commands run with GH_NO_UPDATE_NOTIFIER=1 to avoid noisy prompts.