Have you looked at Trilium Notes? It appears to match all of your requirements, and is scriptable. It's also strongly FOSS, in the AGPL sense. It also has the

Have you looked at Trilium Notes? It appears to match all of your requirements, and is scriptable. It's also strongly FOSS, in the AGPL sense. It also has the ability to self-host a sync server. https://github.com/zadam/trilium https://github.com/zadam/trilium