Ad-hoc test session for UI-triggered check runs

Problem
Teams deploying to production frequently want to run quick sanity checks post-deploy by using the "Schedule Now" button in the Checkly UI to trigger specific checks across different groups. Today, results scatter back to each check's own group, so finding what you just ran means opening every group individually and matching on run time. With hundreds of checks per feature, this is painful.

Ask
Let a user select N checks from anywhere in the UI, run them together as an ad-hoc session, and see the consolidated results in one place (mirroring the Test Sessions view produced by npx checkly test, but for UI-triggered runs). The session should persist so the user can return to it, see who ran it, duration, pass/fail per check, and drill in.

Why not the CLI workaround
Test sessions via the CLI work well for teams already set up locally, but not for engineers who don't have the Checkly project cloned. The ask is specifically for this experience inside the Checkly UI, not the terminal.