Bugfix: Observation.update_stats_for_observations_of was updating way too many records.
Bugfix: Observation.update_stats_for_observations_of was updating way too many records.

HotFusionMan/inaturalist,calonso-conabio/inaturalist,loarie/inaturalist,lucas-ez/inaturalist,lucas-ez/inaturalist,alexshepard/inaturalist,alexshepard/inaturalist,inaturalist/inaturalist,pleary/inaturalist,calonso-conabio/inaturalist,HotFusionMan/inaturalist,loarie/inaturalist,alexshepard/inaturalist,inaturalist/inaturalist,lucas-ez/inaturalist,pleary/inaturalist,loarie/inaturalist,pleary/inaturalist,pleary/inaturalist,calonso-conabio/inaturalist,calonso-conabio/inaturalist,calonso-conabio/inaturalist,HotFusionMan/inaturalist,loarie/inaturalist,alexshepard/inaturalist,alexshepard/inaturalist,HotFusionMan/inaturalist,inaturalist/inaturalist,inaturalist/inaturalist,HotFusionMan/inaturalist,loarie/inaturalist,inaturalist/inaturalist,lucas-ez/inaturalist,pleary/inaturalist,lucas-ez/inaturalist