search.nos.today doesn't keep the events older than 30 days regardless of the event kind on the current configuration deployed. The reason I'm doing this is because I just wanted to have a chronological search (especially for events written in Japanese language) and to limit the resource required. Therefore, it is not suitable for searching metadata. I think it might be better to vary the TTL depending on the kind.

Its backend implementation, searchnos, however, do parse JSON of metadata content and index. https://github.com/darashi/searchnos/blob/fa5991197bf183fd0a18904a5cddb5253309ae4e/src/index/text.rs#L6-L11