[Test] End-to-end integration test against live IICP mesh (blocked on W-011)

[RobLe3]

Summary

All current tests are unit tests with respx mocks. No integration test exercises a real IICP node. This issue tracks the work to add one once a node with a publicly-routable endpoint is registered.

Current blocker

GET /api/v1/discover returns endpoint: "http://localhost:8080/..." for all registered nodes (W-011 — adapter registered with non-internet-routable public_endpoint). submit() and chat() will fail with a connection error until at least one node registers with a real public endpoint.

What to add (once blocker is cleared)

# tests/test_integration.py  (skip if IICP_INTEGRATION_TEST not set)
@pytest.mark.skipif(not os.getenv("IICP_INTEGRATION_TEST"), reason="requires live node")
@pytest.mark.asyncio
async def test_live_discover():
    client = IicpClient(ClientConfig(directory_url="https://iicp.network/api"))
    nodes = await client.discover_async("urn:iicp:intent:llm:chat:v1")
    assert len(nodes.nodes) > 0
    assert nodes.nodes[0].endpoint.startswith("http")

@pytest.mark.skipif(not os.getenv("IICP_INTEGRATION_TEST"), reason="requires live node")
@pytest.mark.asyncio
async def test_live_chat():
    client = IicpClient()
    response = await client.chat_async(
        messages=[{"role": "user", "content": "Reply with exactly: IICP OK"}]
    )
    assert response.choices[0].message.content

Acceptance criteria

• W-011 cleared (at least one node with a routable endpoint)
• tests/test_integration.py added with live discover + chat tests
• CI optionally runs integration tests when IICP_INTEGRATION_TEST=1 secret is set