set_topic_last_post_at should use post's own created_at
set_topic_last_post_at should use post's own created_at

sandboxrem/forem,gabriel-dehan/forem,rdy/forem,codev/forem,tomkrus/forem,ascendbruce/forem,knewter/forem,danman01/forem,knewter/forem,jarray52/forem,BoboFraggins/forem,nikolaevav/forem,eivindhagen/forem,netjungle/forem,bodrovis/forem,radar/forem,ajeje/forem,BanzaiMan/forem,trakt/forem,bcavileer/forem,tomrc/forem,codev/forem,radar/forem,moh-alsheikh/forem,mhoad/forem,elm-city-craftworks/forem,amwelles/forem,jeremyong/forem,BanzaiMan/forem,trakt/forem,elm-city-craftworks/forem,joneslee85/forem,kunalchaudhari/forem,tomrc/forem,hepu/forem,rubysherpas/forem,jaybrueder/forem,jaybrueder/forem,code-mancers/forem,code-mancers/forem,RostDetal/forem,0xCCD/forem,kot-begemot/forem,ketanjain/forem,ajeje/forem,SamLau95/forem,syndicut/forem,tonic20/forem,NOX73/forem,syndicut/forem,abrambailey/forem,bvsatyaram/forem,devleoper/forem,frankmarineau/forem,kamarcum/forem,RostDetal/forem,zhublik/forem,andypike/forem,zhublik/forem,moh-alsheikh/forem,ketanjain/forem,gabriel-dehan/forem,prasadrails/forem,zshannon/forem,beansmile/forem,nikolaevav/forem,wuwx/forem,zhublik/forem,hepu/forem,mauriciopasquier/forem,nikolaevav/forem,sandboxrem/forem,danman01/forem,yan-hoose/forem,frankmarineau/forem,radar/forem,mijoharas/forem,xenonn/forem,brooks/forem,etjossem/Goodsmiths-Hub,wuwx/forem,mmcc/forem,trakt/forem,bagusyuu/forem,kamarcum/forem,kl/forem,ketanjain/forem,abrambailey/forem,mmcc/forem,frankmarineau/forem,SamLau95/forem,hanspolo/forem,hanspolo/forem,beefsack/forem,devleoper/forem,prasadrails/forem,rubysherpas/forem,beansmile/forem,efrence/forem,joneslee85/forem,Fullscreen/forem,rubysherpas/forem,ciscou/forem,bcavileer/forem,bbatsov/forem,andypike/forem,tomkrus/forem,ch000/forem,mijoharas/forem,yan-hoose/forem,daniely/forem,efrence/forem,eivindhagen/forem,ascendbruce/forem,kot-begemot/forem,Fullscreen/forem,xenonn/forem,juozasg/forem,kenmazaika/forem,jarray52/forem,devleoper/forem,NOX73/forem,jeremyong/forem,rdy/forem,mhoad/forem,wesleycho/forem,mauriciopasquier/forem,jaybrueder/forem,tonic20/forem,tomrc/forem,ajeje/forem,ciscou/forem,bvsatyaram/forem,BoboFraggins/forem,daniely/forem,bagusyuu/forem,0xCCD/forem,juozasg/forem,kunalchaudhari/forem,hanspolo/forem,netjungle/forem,efrence/forem,wesleycho/forem,link-er/forem,wuwx/forem,kl/forem,bbatsov/forem,link-er/forem,etjossem/Goodsmiths-Hub,amwelles/forem,brooks/forem,zshannon/forem,beefsack/forem,kenmazaika/forem,RostDetal/forem,bodrovis/forem,ch000/forem