milestones 1-6 complete: fetch/cache from data.usajobs.gov, local filters
for pay plan/grade/salary/location, rich table output, questionary selection
prompt, and org-mode export. key field mappings resolved from live api
inspection (JobGrade[0].Code for pay plan, UserArea.Details for grades and
clearance, city-part location matching due to api returning full state names).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
