Volume type/venue type mismatch

Volumes obligatory declare a `type` of `"journal"` or `"proceedings"`.

Venues (in data/venues.json) optionally declare a type. In practice, it is only ever declared for `"journal"`.

The following are explicitly inconsistent, with the volume declared as a proceedings and the venue declared as a journal: `2006.tal-1 2006.tal-2 2006.tal-3 2007.tal-1 2007.tal-2 2007.tal-3 2008.tal-1 2008.tal-2 2008.tal-3 2009.tal-1 2009.tal-2 2009.tal-3 2010.tal-1 2010.tal-2 2010.tal-3 2022.ijclclp-1 2022.ijclclp-2 2023.jlcl-1 2023.jlcl-2 O00-2 O00-3 O01-2 O01-3 O02-1 O02-2 O03-4 O03-5 O04-2 O04-3 O05-2 O05-3 O05-4 O05-5 O06-2 O06-3 O06-4 O06-5 O07-3 O07-4 O07-5 O08-3 O08-4 O08-5 O08-6 O09-3 O09-4 O09-5 O09-6 O10-3 O10-4 O10-5 O11-3 O11-4 O12-2 O12-3 O12-4 O12-5 O14-2 O14-3 O14-4 O14-5 O15-2 O15-3 O16-2 O16-3 O17-2 O17-3 O96-2 O97-3 O97-4 O98-3 O98-4 O99-3 O99-4`

DND and JCLIB are journals listed as such at the volume level but with no declared type in venues.json. I will fix that.

Should there be tests for consistency?

Note that there are interesting cases of multiple venues. E.g. https://preview.aclanthology.org/landing-page/volumes/J03-3/ has as the workshop WAC as a venue (they sponsored as special issue). Perhaps the requirement should be that journal-volume => at least one venue declared as a journal, and venues declared as journals should only apply to journal volumes.