pub fn from_jsonl(text: &str) -> Result<Vec<UsageRecord>>Expand description
Parse a JSONL usage log back into records — the exact inverse of
to_jsonl. Blank lines are skipped (tolerates a trailing newline or
hand-edited whitespace); a malformed line is a hard error (unlike the
hooks/sidecar “fail open” posture — a corrupt usage record should be
visible, not silently dropped, since it’s accounting data).