Add spec testing for reporting just the Titles of Jobs in a JobList.
Add JobListReportGenerator, JobListReport, and JobListTitleReport classes to fulfill the most recent spec.
Add JobType#to_string in anticipation of using it in Reports.
Expand JobListReportGenerator spec to use more labels and to check the default report output.
Update JobListReport to provide the new default report content.
Update interactions.md with the latest local TODO item.
Update jobseeker_spec.rb to reflect the pending refactoring of JobApplicationRecord, JobApplicationRecordList and JobApplicationRecordService to to tie Jobseekers to Postings instead of to Jobs.
Refactor JobApplicationRecord, JobApplicationRecordList, and JobApplicationRecordService so that JobApplicationRecord ties Jobseekers to Postings instead of to Jobs.

Add Posting#job_requires_resume? to reflect the refactoring.