Convert scale and offset to string for JSON

[paskino]

Description

Example Usage

Contribution Notes

• The content of this Pull Request (the Contribution) is intentionally submitted for inclusion in CIL (the Work) under the terms and conditions of the Apache-2.0 License
• I confirm that the contribution does not violate any intellectual property rights of third parties

❤️ Thanks for your contribution!

Changes

Save the string representation of a float to JSON as numpy.float32 is not supported.

Testing you performed

Please add any demo scripts to https://github.com/TomographicImaging/CIL-Demos/tree/main/misc

Related issues/links

• Closes TIFF compression unit tests fail with numpy v2 as numpy float32 can't be dumped to json #2030

Checklist

• I have performed a self-review of my code
• I have added docstrings in line with the guidance in the developer guide
• I have updated the relevant documentation
• I have implemented unit tests that cover any new or modified functionality
• CHANGELOG.md has been updated with any functionality change
• Request review from all relevant developers