2/29 - Foreign Key Transformations

1. Support primary key and foreign key transformations
2. Include constraints in Schema table for filtering, searching, sorting
3. Update SSH tunnel session sharing to be much more efficient
4. Update job details to surface an error if the job times out
5. Add isNullable column to the Schema table
6. Add regular expression to character scramble transformer
7. Update sync job to handle reserved keyword columns
8. Handle column lengths in data generation so that we never overflow a column
9. Fixed a bug that broke the data generation form when you switch tables
10. UI/UX refinements