docs: add missing assign_work_item.rs to AGENTS.md architecture tree

[github-actions]

Agent Documentation Update

Findings

Area	Issue	File(s)
accuracy	src/safe_outputs/assign_work_item.rs implements the assign-work-item safe output (correctly documented in docs/safe-outputs.md) but was missing from the safe_outputs/ directory listing in the AGENTS.md architecture tree	AGENTS.md

Applied Fixes

• Added assign_work_item.rs in alphabetical position within the safe_outputs/ tree listing in AGENTS.md

Notes

Verified by diffing ls src/safe_outputs/*.rs against every .rs filename listed in the AGENTS.md architecture tree — assign_work_item.rs was the only file present in the source tree but absent from the documented tree. Cross-checked docs/safe-outputs.md's ### assign-work-item section against src/safe_outputs/assign_work_item.rs and confirmed the feature documentation itself is accurate and complete; only the architecture-tree index entry in AGENTS.md was out of sync.

---

Created by the agent-documentation maintainer workflow.

Generated by Agent Documentation Maintainer · auto · 41.4 AIC · ⌖ 6.52 AIC · ⊞ 13.5K · ◷

[azure-pipelines]

Azure Pipelines:
2 pipeline(s) were filtered out due to trigger conditions.
There may be pipelines that require an authorized user to comment /azp run to run.