Honestly, when a road is closed for a weekend at irregular intervals without a schedule in advance its not reasonable to map it. I contribute to OSM from time to time and thought about it as well but the general consensus is to map regular closures or road closures that go on for like more than a month. OSM is a general purpose map and not for mapping road closures as current data will be used long after now on offline navigation gps devices. We would probably need an open street closure map that aggregates all the databases for road closures and interact with osm. For the major ones I know I’ve just been blocking what I know locally to not route through it, as I can’t be bothered in starting a project like that
Although not open source, I use Obsidian since its really extensible, works completely local and has open source extensions. I thought about using Logseq too. I’d never trust Microsoft with my personal notes tho.