Codex re-gate found the baseline was still after the preliminary
_active_run_stream_for_session() lookup + the initial cursor read_session_run_events()
replay — a run completing during either window folded into the baseline and was
silently missed. Move the fingerprint baseline to immediately after resume_event_id
parsing, before both operations, so no pre-baseline completion window remains. Remove
the now-redundant later baseline. 23/23 SSE tests green.
Co-authored-by: rodboev <rodboev@users.noreply.github.com>