Collaboration API: GET Operations

[btoron]

Overview

Implement the Collaboration API GET methods in the async client. This is a new API module not yet present in the async client.

Endpoints (3)

ID	Method	Path
CB001G	GET	addressBook
CB004G	GET	chats/{chatId}/messages
CB005G	GET	chats/{chatId}/participants

Method count: 3 GET operations

Implementation Notes

• Create new module ofsc/async_client/collaboration.py with AsyncOFSCollaboration class
• Wire into AsyncOFSC main client (similar to capacity, metadata, core)
• Create corresponding Pydantic models in ofsc/models/ (new collaboration.py or add to __init__.py)
• Capture saved responses via scripts/capture_api_responses.py
• Create test file tests/async/test_async_collaboration.py
• Run uv run python scripts/update_endpoints_doc.py --force after implementation
• Update README with new Collaboration section

Acceptance Criteria

• AsyncOFSCollaboration class created with all 3 GET methods
• Module wired into AsyncOFSC
• Pydantic models created for response types
• Mocked tests passing
• Live tests marked with @pytest.mark.uses_real_data
• ENDPOINTS.md updated