Add Asqav to external tracing processors list

[jagmarques]

Summary

Add Asqav to the external tracing processors list in the tracing docs. Asqav provides AI agent governance with tamper-evident audit trails and quantum-safe signatures.

• PyPI: https://pypi.org/project/asqav/
• Integration module: asqav.extras.openai_agents
• Docs: https://asqav.com/docs/integrations

Test plan

• Docs-only change (single line addition to docs/tracing.md)
• Verified link format matches existing entries

Issue number

N/A

Checks

• I've added new tests (if relevant)
• I've added/updated the relevant documentation
• I've run make lint and make format
• I've made sure tests pass

[seratch]

Your integration is great! However, the page lists only the integrations supporting the tracing interface. If your package supports tracing as well, please send this document change then.

[jagmarques]

Thanks for the review! Makes sense - I'll add a TracingProcessor implementation to asqav and resubmit once it's published. Appreciate the pointer.