prune_old_entries' active-process guard failed open: when
has_active_processes_fn raised, the except block logged at debug and
fell through to the age check, so sessions with live background
processes attached could still be pruned — violating the documented
invariant that such sessions are never dropped. Add a continue so an
exception in the safety check fails safe (the entry is kept).
Commit 6b408e131 fixed the session_key/session_id mismatch in this
same guard but left the exception path failing open.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Rory Ford
ca559a7852