* fix(rank): include job posting URL in shortlist/below-threshold/excluded tables
/rank's output tables listed title, company, and score but dropped the
posting link, forcing the user to go dig it out of seen_jobs.json to
open a job they wanted to act on. The key in seen_jobs.json is already
the URL, so this is a formatting fix, not a new lookup.
* fix(rank): link to entry's url field, not the seen_jobs.json key
Some portals key seen_jobs.json entries by a company+title composite
rather than the URL, so [Link](<key>) could render a broken link.
Every entry carries a dedicated url field, which is always valid.
