feat: Support serializing dataclasses

[rossgray]

Adds support for serializing Python dataclasses in event data.

[greptile-apps]

PR Summary

Added support for serializing Python dataclasses in event data, allowing for better integration with modern Python codebases.

• Added _clean_dataclass function in posthog/utils.py to handle dataclass serialization
• Added comprehensive test coverage in test_utils.py for nested dataclasses with various field types
• Modified clean function to detect and process dataclass instances appropriately
• Version bumped to 3.21.0 to reflect new feature addition

_{4 file(s) reviewed, 1 comment(s)
Edit PR Review Bot Settings | Greptile}

[rafaeelaudibert]

Looks good, but I don't know enough about the release process on this lib so I'll leave that to you :)

[rafaeelaudibert]

Actually, question: won't that from dataclasses import ... fail on older Python versions?

[pauldambra]

👍

looking at CI we only explicitly support python 3.9 and above so good to directly reference dataclasses