feat(ci): add wait flag to run status

[ImLunaHey]

Add --wait to wait for a CI run and return its final status.

depot ci status <run-id> --wait
depot ci status <run-id> --wait --output json

• Poll every five seconds; write progress to stderr and final details to stdout.
• Exit 0 for finished runs and 1 for failed or cancelled runs.
• Stop on context cancellation or API errors; preserve behavior without --wait.
• Cover polling, terminal states, JSON output, cancellation, and API errors.

Closes https://linear.app/depot/issue/DEP-4013

---

Note

Low Risk
CLI-only polling and exit-code behavior around existing status API calls; no auth or server changes.

Overview
Adds --wait to depot ci status so scripts can block until a run reaches a terminal state.

While the run is still in progress, the command polls ciGetRunStatus every five seconds, prints Run: <id> (<status>) progress lines to stderr, then emits the usual human or JSON result on stdout. With --wait, a finished run exits 0; failed or cancelled runs still print output but return a non-zero error (exit 1). Polling respects command context (cancel during sleep or the next request) and stops on API errors. Runs that are already terminal never sleep or re-fetch.

Tests use testing/synctest to assert interval timing, stderr vs stdout split, JSON final payload, immediate return without --wait or on terminal status, cancellation, and poll failure.

^{Reviewed by Cursor Bugbot for commit 21e02db. Bugbot is set up for automated code reviews on this repo. Configure here.}

[linear-code]

DEP-4013

[cursor]

Risk: low. Approved after Cursor Bugbot and Cursor Security Agent completed successfully with no findings that need human review. No reviewers were assigned.

  

_{Sent by Cursor Approval Agent: Pull Request Router and Approver}