Fix unicode handling in JSON serialization for SQLTrackerStore

[droogg]

This pull request updates the JSON serialization within the SQLTrackerStore to preserve non-ASCII characters such as Cyrillic script. By setting ensure_ascii=False in json.dumps, the data is now stored in its original representation, allowing for proper storage and retrieval of non-ASCII characters. This change addresses issues with Unicode encoding in the database, ensuring that intent and action names containing Cyrillic characters are correctly represented.

Proposed changes:

• Set ensure_ascii=False in json.dumps to preserve non-ASCII characters in the database.

Status (please check what you already did):

• [ ] added some tests for the functionality
• [ ] updated the documentation
• [ ] updated the changelog (please check changelog for instructions)
• [ ] reformat files using black (please check Readme for instructions)

[CLAassistant]

All committers have signed the CLA.