CHANGELOG: append an Unreleased / Fixed entry describing the user-visible
behaviour change (interrupted-turn marker now self-heals on the next
session read; gives up gracefully after 12 retries or 24h).
docs/troubleshooting.md: add a 'Symptom → Why → Diagnostic → Fix →
Caps → When to file a bug' entry for the
'no agent output was recovered' marker so users who hit the lost-response
shape on WSL2 / network FS can recognise it, verify the run-journal on
disk, and know that reloading the session is enough.