Generate MasterLog PDF

[Amnesthesia]

MasterLog needs to be generated as JSON because querying for past loads is unreliable, as users may change their names/equipment/weights/etc which means the data in the master log doesn't accurately provide a snapshot of that day.

Suggest creating an interaction that builds a JSON snapshot of all necessary data, and running this at midnight every day for each dropzone, and if it's speedy enough, maybe every time a load is cancelled or marked as landed as well.

Additionally, we need a way of rendering this snapshot, which means building GraphQL types to retrieve the data, e.g Types::MasterLog::Load, Types::MasterLog::Slot, etc, and adapt the master log screen to query and render this data, and a PDF template to create daily master log PDFs to download at the end of each day