feat(cli): add agent workflows for datasets, evaluation, and review

[liam-langchain]

Superseded: capability PR index

This combined draft is closed and retained only as a historical index. Do not merge or use its code as the current implementation.

Capability	PR	Dependency
Shared diagnostics, resource helpers, and pagination	#309	main
Project creation	#310	#309
Example updates	#311	#309
Run feedback: create, get, list, filters	#312	#309
Dataset curation	#313	#309
Annotation queues	#314	#309
Rules (separately owned)	#315	main
Insights configuration and evidence	#316	main

Merge #309 first. Then retarget #310–#314 to main and run their main-targeted CI. None of those feature PRs depends on another feature PR. Each retains its own tests, README, and manual examples.

All five reorganized branches passed local tests, vet, and build. Feature-owned code matches the backed-up versions; shared code moved into #309. Prior branch heads are preserved locally under codex/backup-split-*-20260915. Live coverage and CI requirements are documented in each PR.

No pushes or merges to main were performed. Engine, rules, project creation, and Insights were not changed during this reorganization.

[liam-langchain]

Superseded by the capability PRs #309–#314 and #316; #315 remains separately owned for rules. This combined draft is retained as a historical index only and should not be merged. The split is being reorganized around shared foundations, with feature-specific tests and docs retained in each capability PR.