[PROD] All appeals CSV download column issue

[szabozoltan69]

Issue

If someone downloads ("Exports") the CSV output from https://go.ifrc.org/alerts/all – it turns out that every 100 rows has a bit different structure.

https://goadmin.ifrc.org/api/v2/surge_alert/?offset=0&limit=100&format=csv
https://goadmin.ifrc.org/api/v2/surge_alert/?offset=100&limit=100&format=csv
https://goadmin.ifrc.org/api/v2/surge_alert/?offset=200&limit=100&format=csv
https://goadmin.ifrc.org/api/v2/surge_alert/?offset=300&limit=100&format=csv
...
https://goadmin.ifrc.org/api/v2/surge_alert/?offset=1500&limit=100&format=csv

So, after merging these pieces the full result will be not usable, due to the "self-decisions of every 100 row's column sequence". We should somehow make columns fixed.