Add version module and add version to tracking

[kylemcnair]

Summary

The primary objective of this PR is to add data-diff version to tracking.

Detail / version module

However, when importing the __version__ variable in the tracking.py module, I ran into circular import errors. Circular references seemed to be related to imports in __init__.py, __main__.py, and tracking.py. Both __init__.py and __main__.py import tracking via from .tracking import disable_tracking.

Errors were all some version of:

Error while finding module specification for 'data_diff.__main__' (ImportError: cannot import name '__version__' from partially initialized module 'data_diff' (most likely due to a circular import)

Rather than trying to disentangle the circular imports, I simply created a version.py module, and parked the __version__ variable there.

Happy to revise this if there's a better path, or if I misunderstood errors. please let me know.

List of changes

• add version.py module with __version__
• remove __version__ from __init__.py
• revise __main__.py to use from .version import __version__
• add __version__ to track events

Event validation in Snowflake

Version is successfully coming through Rudderstack events

select sent_at::date,data_diff_version,*
from "RUDDERSTACK_EVENTS"."OS_DATA_DIFF_PROD"."OS_DIFF_RUN_END"
where context_ip = '98.182.17.95'
order by 1 desc
limit 10

Python formatting

Formatting:

data-diff [version-tracking] black data_diff/tracking.py data_diff/version.py
All done! ✨ 🍰 ✨
2 files left unchanged.