- add API Lookup attribute type with alias, URL, format, match fields, and auto-fill config
- update job type create/edit forms to configure API lookup attributes
- add authenticated /api/proxy route for external lookup requests
- enhance job create/edit flow to load and select API lookup values
- rebuild jobs table columns dynamically from job type attributes
- add unsaved-changes guard for ct-form forms
- include related UI/style updates across job and job-type views