Modify Python Structure so that we treat src as a package

[grahamalama]

Checklist:

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• I have opened my PR against the staging branch, NOT against main
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• My changes generate no new warnings

Description

This is a large PR with 55 files changed, but it's not as big as it looks!

Essentially, I've modified the structure of our Python structure so that src becomes the package that we import from. This way, we don't need to patch PYTHONPATH at all.

Type of change

• Bug fix
• New feature
• Breaking change
• Internal change

How Has This Been Tested?

To test this I:

• cded into the data directory
• set a POSTGRES_PASSWORD and POSTGRES_PORT=5433 in an .env file
• spun up the Postgres database
• ran pipenv run pytest
• observed the tests passing

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Name	Status	Preview	Comments	Updated (UTC)
vacant-lots-proj	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 17, 2025 4:30pm

[github-actions]

This PR has been marked as stale because it has been open for 7 days with no activity.