Training/sdurry jinja macros pck

[sdurry]

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Description & motivation

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Changes to existing models:

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Checklist:

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• My pull request represents one logical piece of work.
• My commits are related to the pull request and look clean.
• My SQL follows the style guide.
• I have materialized my models appropriately.
• I have added appropriate tests and documentation to any new models.
• I have updated the README file.