[AAASM-123] ✨ (openai_agents): Implement FunctionTool governance interception adapter

[Chisanan232]

Description

Implement OpenAI Agents SDK adapter by monkey-patching openai.agents.FunctionTool.__call__ with governance interception, pending-approval flow, ToolResult(error) deny handling, async audit recording, and clean unpatch support.

This PR adds:

• Runtime patch/unpatch for FunctionTool.__call__
• DENY returns ToolResult(error=...) (no exception)
• PENDING approval wait branch with deny fallback to ToolResult(error=...)
• ctx.agent_id extraction with process-level fallback
• Async result recording (record_result + on_tool_end fallback)
• Fail-open execution path for governance backend errors
• Unit and integration coverage for OpenAI adapter and OpenAI+MCP coexistence

Type of Change

• ✨ New feature
• 🔧 Bug fix
• ♻️ Refactoring
• 🍀 Performance improvement
• 📚 Documentation update
• 🚀 Release

Breaking Changes

Does this PR introduce any breaking changes?

• No
• Yes (please describe below)

Related Issues

• Related JIRA ticket: AAASM-123
• Related GitHub issues: N/A

Testing

Describe the testing performed for this PR:

• Unit tests added/updated
• Integration tests added/updated
• Manual testing performed
• No tests required (explain why)

Commands run:

• COVERAGE_FILE=/tmp/aaasm123_full.coverage uv run pytest

Result:

• 119 passed, 7 skipped

Checklist

• Code follows project style guidelines
• Self-review completed
• Comments added for complex logic
• Documentation updated if needed
• All tests passing

[codecov]

Codecov Report

❌ Patch coverage is 98.67550% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
agent_assembly/adapters/openai_agents/patch.py	98.66%	2 Missing ⚠️

📢 Thoughts on this report? Let us know!

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
98.7% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud