Codeignitor guru - add a data migration system on existing platform

We have a booking software to allow gyms to manage their studios where customers can book classes, make payments, etc. We want add a small system (3 pages) in order to allow new gyms who join platform to migrate their data from old system to new. Specifically it involves: - Screen to import data (4 types of data) where they can bulk import from csv, text file into staging tables - Migration dashboard - there they can see what is status of migration (who migrated, who is pending), send reminders, etc - Email templates (we already have this setup, you just need to replicate it across) Obviously, we need to add a workflow to move customer across. So, they need to set new password, also we move data from staging to main tables. We have wireframes Candidate: a. Our platform is build on Codeignitor. For css, we use a popular template called Pages. b. Need to know Bitbucket and AWS (deploying, etc) b. You need to be available to work and not have parrellel projects. We want it wrapped up in 1-2 weeks Screening Questions: a. In bulk data imports, apart from obviously inserting data into databases. What other scenarios it should be able to handle? (example: clear data, skip rows that already exists) b. WHen migrating a customer from staging, what do you think is the flow internally to move data from staging to main table?