Rebasing against v2024.3.1

[johanvdw]

As we found out, forking is harder than merging, but let's try to track either pretalx v2024.3.1 or main and rebase our changes. I'm creating this issue to follow up and creating new branches in pretalx-integration and pretalx.

model changes required :

• add matrix_id (plugin?)
• add cc: field to mail/mailtemplate (upstream?)
• on website field

strictly required changes before we move:

• signals for track expansion (upstream)
• track_mail logic (track mail as signal)
• add cc field to mail (upstream?)
• show other proposals in review (check if not added upstream, it was discussed)
• show resources in review
• file upload limit (check we can do this on deploy in ansible instead)
• state change only by devroom managers
• vue app changes required to show all rooms/tracks
• show matrix_id in relevant places
• nanoc and devroom manager plugin work (probably need bootstrap changes)
• auditlog
• add big orga button (propose upstream)

other changes that should happen, but are not yet needed at this point

• near overlaps warnings (upstream)
• release logic - on website field / hide release button
  minor changes:
• session image comment
• datetime picker/times in steps of 5 minutes (propose upstream)
• use our feedback system
• fellow role instead of fellow speaker (propose upstream): ie for call for devrooms/stands
• powered by pretalx should mention we have a fork + where to submit issues
• duration can not be updated by submitter (check how this is best handled)

nice to have, but may have better solutions:

• check errors
• keep track who sent mail + limit that (not yet implemented)

this overview was created by running
git diff fosdem_2024_extra..fosdem_2024_rebase which should help find the changes mentioned above

[johanvdw]

steps to migrate the db:

# mail saw no changes, so not needed to fake
python -m pretalx migrate person 0027 --fake
python -m pretalx migrate devroom_settings 0007 --fake
after updating the branch:
python -m pretalx migrate person 0030 --fake
python -m pretalx migrate devroom_settings 0011 --fake
python -m pretalx migrate submission 0078 --fake