investigate how much of this and the later one above is needed
picked but melded into another
ec846b3 - (2023-02-04) Don't miss physical talks in the scheduler - Olivier Wilkinson (reivilibre)
discard (was reverted)
8a186a1 - (2023-02-03) Don't require all people to be resolved to do invites: carry on anyway - Olivier Wilkinson (reivilibre) (origin/rei/fd22_nodupe_people)
seems well-intentioned (comments out use of the PentaDb where we shouldn't really use it) but does seem to lead to a loss of getting coordinators from the talk
701ac77 - (2023-02-03) Thread the PentaDb through the interface rather than downcasting - Olivier Wilkinson (reivilibre)
sounds obsolete, particularly as we don't like the PentaDb anymore :p
overview of commits and whether I think we need to consider taking them on for this year