Updated EOO after entering new polygon

[stevenmartin123]

Problem

Taxon and Community models have a field "EOO". The field is manually populated or in batch through the API, but there is no automation to link EOO to related occurrences. Especially newly added and "QA: curated" occurrences inform the current EOO.

Reproducible example

• Step 1: Add an occurrence to a Taxon or Community. QA to level "accepted" (curated).
• Step 2: The EOO does not update but it would make sense if it would.

[florianm]

That's deliberate: EOOs cannot be derived from occurences automatically - too many assumptions to check (e.g. three generations = different between taxa).

EOOs are currently populated with the convex hull of all occurrences (incorrectly including older occurrences which do not inform current EOO any more).

EOOs are currently used in the GUI list filters.

EOOs should be updated from expert analyses. Idea: if a cut-off date were added to taxon/community (manually set on case by case basis, with a safe default of say 20 years), then we could auto-update the EOO on any change to occurrences.