Approximate per-depth-level budget for output length.
When the accumulated output at any single depth level exceeds this value,
further nesting is collapsed. This is a heuristic safety valve, not a hard
limit — total output can reach up to roughly maxDepth × maxOutputLength.
Approximate per-depth-level budget for output length. When the accumulated output at any single depth level exceeds this value, further nesting is collapsed. This is a heuristic safety valve, not a hard limit — total output can reach up to roughly
maxDepth × maxOutputLength.