Harvest data from online OJS instances at fixed interval

[uxairibrar]

Closes #47

• Configured Django-Q task scheduling to automate harvesting at defined intervals.
• Developed unit tests for task scheduling (test_task_scheduling) and duplicate prevention (test_no_duplicates).
• Created HarvestingEvent model to track harvesting jobs and their statuses.
• Modified the Publication model to support additional metadata.
• Added Django Admin actions for manually triggering harvesting from the admin panel.

[nuest]

I don't see any code related to Django-Q in this PR.

Could you please add a few illustrating screenshots how the interaction with the admin UI works? Thanks!

[uxairibrar]

I don't see any code related to Django-Q in this PR.

Could you please add a few illustrating screenshots how the interaction with the admin UI works? Thanks!

So, I wanted to automate this scheduling process, so I put adding scheduler on save in the models file. However, now I have also added a seperate admin action for it.

[nuest]

@uxairibrar Tests are working again and branch is updated from main.

Tests are failing.

[nuest]

All good - please just fix the failing tests: https://github.com/GeoinformationSystems/optimap/actions/runs/14266473472/job/39989399641?pr=87

[nuest]

I'll go ahead and merge - thanks for the efforts.

I do think though that we will have to improve the tests over time, as not all conditions are tested, for example:

• You check for "greater than zero" many publications, when you should know the exact number and test for that.
• You test only that the DOI starts with "10.", when you know the exact DOI. What if the regex if incorrect towards the end of the DOI?