We have to figure out if `mergeRels: true` is actually avoiding
duplicate relationships 🤔.
Before:
(l1)-[:IS_IN]->(l2)
(l1)-[:IS_IN]->(l3)
After:
(l1)-[:IS_IN]->(new)
(l1)-[:IS_IN]->(new)
- create command should be run with --date-format to be more human
readable, and --template-file to use our template instead of migrate's
default
- rename migrations
- rename createdAt to migratedAt to remove ambiguity
- do not merge relationships for Location nodes as we don't want to
create duplicate relationships
- use singular locationId as it's iterating one at a time
