Execution Order Probe

Write runProbe(log) — log is a function that records strings. WITHOUT calling log directly except inside the callbacks, schedule exactly this sequence using log: 1. synchronously: log("sync") 2. a microtask: log("micro") (use Promise.resolve().then) 3. a macrotask: log("macro") (use setTimeout with 0) The probe function itself must return the string "scheduled" immediately, and all three logs must have happened by the time the test awaits one 20ms timeout.

Difficulty: intermediate