GPL-745 Add sample and plate uuids to lighthouse cherrypicking - Crawler

[andrewsparkes]

User story
As developers we would like to add sample and plate UUID fields to the Mongo, MLWH and DART databases. This will improve uniqueness and make event handling easier.
This story is for the Crawler changes.
See also story sanger/unified_warehouse#145 for the unified warehouse changes.

Who are the primary contacts for this story
Andrew, Chris, Eduardo, Alex

Acceptance criteria
To be considered successful the solution must allow:

• Each sample entry into the Mongo and MLWH, and DART databases will be given a unique UUID for sample
• Each sample entry into the Mongo and MLWH database will be given a unique UUID for plate
• A new table 'source_plates' to store the plate UUIDs will be created and checked for each sample row insert in case the plate has been seen before (see confluence below for columns and indexes)
• Update https://ssg-confluence.internal.sanger.ac.uk/display/PSDPUB/i.+Low+Occupancy+Cherry+Picking with any new error TYPEs

Dependencies
#145

Additional context
See https://ssg-confluence.internal.sanger.ac.uk/display/PSDPUB/Cherrypicking+Events