[Bug]Events are not correctly aggregated by country #595
Description
On a country page and on the map page, not all events are listed.
For example for France (https://techcommunitycalendar.com/country/france/), only Cloud Alpes is listed in upcoming events and there is no recents events. However, when we go to the city Paris in France (https://techcommunitycalendar.com/city/paris), there are 3 recent events listed, that should also be listed in France page. And when we go in Tech events in September (https://techcommunitycalendar.com/9/2023/) we can see there are different other upcoming events in France. These events are not listed in the Map page as well.