Kraken

What's Changed
* Pins python-bidi to a version that supports our internal data structure mangling
* Fixes a small regression in pretraining
* Various PageXML serialization improvements
* ketos now prints a helpful message when trying to use a binary file with the `-t/-e` options expecting manifest files
* Fixes serialization of dummy boxes by PonteIneptique in https://github.com/mittagessen/kraken/pull/612
* Update alto to not produce Polygon tag on default blocks by PonteIneptique in https://github.com/mittagessen/kraken/pull/620
* corrected mask of patch by saiprabhath2002 in https://github.com/mittagessen/kraken/pull/617

New Contributors
* saiprabhath2002 made their first contribution in https://github.com/mittagessen/kraken/pull/617

**Full Changelog**: https://github.com/mittagessen/kraken/compare/5.2.5...5.2.9

* Fixes XML serialization of segmentation results (597)
* Removes regression in polygonization code introduced with performance enhancements (605)
* `extract_polygons()` now raises an exception when processing baselines < 5px in length (606)
* Various small improvements to `contrib/segmentation_overlay.py`
* `ketos compile` progress bar now displays elapsed/remaining time (504)

* Fixes a regression in container-based binary dataset building
* Fixes spurious updates of validation metrics after sanity checking

What's Changed
* Hotfix for segmentation training

Hotfix release fixing a regression in no_segmentation recognition.

This release contains two small fixes for a regression related to bumping lightning up to 2.2 and a crash in `Segmentation` instantiation occurring when the first region type does not contain a region/dict.