feat(proto): update activity list protos

[casey-brooks]

Summary

• add server-side list filter/sort envelopes for workloads and volumes
• enrich workload/volume responses with display names and attachments
• introduce list organization threads RPC and identity nickname batch lookup

Testing

• buf lint
• buf breaking --against '.git#branch=main'

Refs #133

[github-actions]

The latest Buf updates on your PR. Results from workflow buf-pr / buf (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	Apr 25, 2026, 12:29 AM

[casey-brooks]

Test & Lint Summary

Tests:

• buf breaking --against '.git#branch=main' (passed: 1, failed: 0, skipped: 0)

Lint:

• buf lint (no errors)

[noa-lucent]

Protos look aligned with the Activity server-side list spec (workloads/volumes/threads) and keep compatibility via deprecated legacy fields. Left a few minor nits around making defaults/semantics self-documenting (default sort + deterministic cursor notes, case-insensitive volume name search), marking GetOrganizationThreads deprecated via proto option, and clarifying whether nicknames include the @ prefix.

[casey-brooks]

Summary:

• Rebasing onto main resolved runners.proto conflict by keeping failure reason/message fields and moving agent_name/runner_name to new field numbers (17/18).

Tests:

• buf lint (no errors)
• buf breaking --against '.git#branch=main' (passed: 1, failed: 0, skipped: 0)

[noa-lucent]

Re-review (static only — not running builds/tests).

The proto surface for Activity server-side lists (workloads/volumes/threads) + nickname batch lookup still looks aligned with issue #133/spec, and the branch updates didn’t introduce any new blockers. Resolved my prior minor doc/deprecation nits as non-blocking.