doc: "Add OpenBox middleware integration"

[ash-krnl]

Overview

Adds a new integration page for OpenBox, a real-time governance and observability middleware for LangGraph and DeepAgents applications. The page covers both openbox-langgraph-sdk-python and openbox-deepagent-sdk-python, including quickstart examples, full configuration references, OTel hook governance, per-subagent Rego policy targeting, HITL setup, error handling, and known limitations.

Type of change

Type: New documentation page

Related issues/PRs

• GitHub issue:
• Feature PR:

Checklist

• I have read the contributing guidelines, including the language policy
• I have tested my changes locally using docs dev
• All code examples have been tested and work correctly
• I have used root relative paths for internal links
• I have updated navigation in src/docs.json if needed

Additional notes

Both packages are authored and maintained by OpenBox and are published on PyPI:

• openbox-langgraph-sdk-python
• openbox-deepagent-sdk-python

[ash-krnl]

Mason Daugherty (@mdrxy) can you please review it? Please let me know if you need anything else.