[Glitch] Fix an issue where polls with 'expires_at' not set expired
[Glitch] Fix an issue where polls with 'expires_at' not set expired

Port 5b46467474dd88e1563561bf50643324b4f021e8 to glitch-soc

Signed-off-by: Thibaut Girka <428c7871dd6adbdc20a11fdac0dfe6a015f06403@sitedethib.com>

glitch-soc/mastodon,Kirishima21/mastodon,Kirishima21/mastodon,im-in-space/mastodon,Kirishima21/mastodon,im-in-space/mastodon,im-in-space/mastodon,glitch-soc/mastodon,im-in-space/mastodon,Kirishima21/mastodon,glitch-soc/mastodon,glitch-soc/mastodon