Function resolve_public_outcome_cursor 

pub fn resolve_public_outcome_cursor<R>(
    reads: &mut R,
    outcome_key: &str,
    outcome: &StoredPublicOutcome,
) -> Result<Option<String>, <R as PublicReplayReads>::Error>
where
    R: PublicReplayReads,

Resolve the exact cursor carried by one retained outcome row — resolve_replay_cursor wired to the outcome surface: the run_id scan, and the durable outcome row as the GC-race re-read.