* Switched to [poetry](https://python-poetry.org/) for packaging
* Removed compatibility patches for nbconvert < 6 per [777](https://github.com/ucbds-infra/otter-grader/issues/777)
* Updated Otter Export to throw an error if nbconvert<6.0.0 is found
* Converted Otter Export's PDF via HTML exporter to use nbconvert's WebPDF exporter per [781](https://github.com/ucbds-infra/otter-grader/issues/781)
* Removed pdfkit from dependencies
* Added ability to export PDFs via HTML in grading containers per [782](https://github.com/ucbds-infra/otter-grader/issues/782)
* Set default Python version for grading images to 3.12
* Remove support for Python versions < 3.9 per [668](https://github.com/ucbds-infra/otter-grader/issues/668)
* Removed `setuptools` and `pkg_resources` dependencies
* Remove dependencies not strictly required by Otter in the grading environment per [739](https://github.com/ucbds-infra/otter-grader/issues/739)
* Handle empty assignment configs in Otter Assign per [795](https://github.com/ucbds-infra/otter-grader/issues/795)
* Removed `Notebook` `colab` and `jupyterlite` arguments, switching to always determining the interpreter automatically
* Made `dill` a required dependency
* Removed `variables` key of assignment config in favor of `generate.serialized_variables` in Otter Assign per [628](https://github.com/ucbds-infra/otter-grader/issues/628)
* Update Otter Assign to add cell metadata so that questions with no check cell have their tests run after the last solution cell per [798](https://github.com/ucbds-infra/otter-grader/issues/798)
* Updated Otter Assign to strip type annotations from generated test code per [796](https://github.com/ucbds-infra/otter-grader/issues/796)
* Updated Otter Grade Docker image to create an empty `submission_metadata.json` file in the grading image to prevent plugins from erroring per [811](https://github.com/ucbds-infra/otter-grader/issues/811)
* Added ability to monitor grading progress to Otter Grade per [827](https://github.com/ucbds-infra/otter-grader/issues/827)
* Added handling of student-created files with the `student_files` configuration in Otter Assign per [737](https://github.com/ucbds-infra/otter-grader/issues/737)
* Updated Otter Assign to add a cell to install Otter at the top of Colab notebooks per [861](https://github.com/ucbds-infra/otter-grader/issues/861)
* Added the ability to ignore the `.OTTER_LOG` file to `Notebook.export` and Otter Assign per [857](https://github.com/ucbds-infra/otter-grader/issues/857)
* Fixed OK-test support for the `all_or_nothing` config per [751](https://github.com/ucbds-infra/otter-grader/issues/751)
* Added exception-based test support for the `all_or_nothing` config per [751](https://github.com/ucbds-infra/otter-grader/issues/751)
* Added Otter Assign support for the `all_or_nothing` config per [751](https://github.com/ucbds-infra/otter-grader/issues/751)
* Updated Otter Assign to only allow a function definition and statement to call the test function in exception-based test cells and automatically ignore the latter statement instead of requiring an explicit ` IGNORE` comment per [516](https://github.com/ucbds-infra/otter-grader/issues/516)
* Added additional package versions to the output of `otter --version` per [843](https://github.com/ucbds-infra/otter-grader/issues/843)
* Fixed bug in converting test cells containing indented functions to doctests in Otter Assign per [840](https://github.com/ucbds-infra/otter-grader/issues/840)