Tracing-app chat trace link E2E: message deeplink does not redirect to run

[rowan-stein]

Context

The chat-trace-link Playwright test expects tracing-app to redirect from a message deep link to the corresponding run URL, but it stays on /message/{id}?orgId=... and times out.

Failing run (agents-orchestrator E2E): https://github.com/agynio/agents-orchestrator/actions/runs/26409992104

Failure excerpt:

• Expected pattern: /{orgId}/runs/[0-9a-f]{32}
• Received: https://tracing.agyn.dev/message/{messageId}?orgId={orgId}

Tasks

• Confirm tracing-app message deeplink resolves message -> run for messages created in E2E.
• Fix tracing-app behavior (preferred) or update test expectation if intended behavior differs.

Note: We already merged a tracing-app change to extend polling window; if this still fails, we need deeper investigation into message->run lookup and/or run creation.