Feature/add better scheduling via croniter#473

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om-henners wants to merge 7 commits intogeopython:masterfrom

om-henners:feature/add_better_scheduling_via_croniter

Commits on Aug 28, 2024

Add the croniter library to requirements
Henry Walshaw
committed
Add a cron column with a validator.
Henry Walshaw
committed
``add_job`` in scheduler preferences the cron formula if available
Henry Walshaw
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Add migration to add the ``cron`` column to the ``resource`` table
Henry Walshaw
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Set ``nullable=False`` to match migrations
Henry Walshaw
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Add the crontab fields to the form
Henry Walshaw
committed
Shorten lines to pass flake8 tests
Henry Walshaw
committed