- Preserve `actual_result_count` on flattening nested LazyCat's.
- Preserve the `actual_result_count` on all lazy return values. This allows to get proper batching information from catalog results which have been restricted by `sort_limit`.
- Made sure `actual_result_count` is available on all lazy classes and falls back to `__len__` if not explicitly provided.
- Optimized length calculation of Lazy classes.
2.13.1
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- Added automatic sorting limit calculation based on batch arguments. If the query contains a `b_start` and `b_size` argument and no explicit `sort_limit` is provided, the sort limit will be calculated as `b_start + b_size`.
- Avoid pre-allocation of marker items in `LazyMap`.
2.13.0
-------------------
- Fix `LazyMap` to avoid unnecessary function calls.