[codex] Update sdk-go pagination handling

[cploujoux]

Summary

• Update github.com/blaxel-ai/sdk-go to v0.21.0.
• Keep CLI list behavior unchanged by fetching all cursor-paginated pages internally.
• Update completions, nested job execution listing, and tests for the new {data, meta} response shape.

Validation

• go test ./...
• make build-dev
• ~/.local/bin/bl version

---

Note

Updates sdk-go from v0.18.0 to v0.21.0, adapting the CLI to the new cursor-paginated {data, meta} response shape. Introduces a generic listAllPages helper that transparently fetches all pages, with cursor loop detection, and replaces all direct .List() calls across completions, commands, and operations.

^{Written by Mendral for commit 4d3063f.}

[mendral-app]

LGTM

The pagination logic is correct: hasMore && nextCursor != "" guards loop continuation, the cursor deduplication map catches infinite loops, and context cancellation propagates properly through each page fetch. No correctness, security, or data loss issues found.

_{Tag @mendral-app with feedback or questions. View session}