External ads (isExternal: true) 404 on /find-job/{jobAdId} and hit the MitID login wall on /job/{jobAdId}. Route them to their employer-provided destination in jobAdUrl when an absolute http(s) URL is present.
When jobAdUrl is missing, empty, or carries an invalid/non-http scheme, fall back to https://jobnet.dk/find-job/{jobAdId} instead of emitting an empty string so downstream /scrape deduplication preserves unique URLs. Both url and jobAdUrl validate the scheme consistently.
Observation and test cases reported by NishilRathod in #557.
Adds additive normalization so jobnet search output carries the cross-portal contract fields (company, location, date, deadline with the 1900-01-01 NotDisclosed sentinel mapped to null, and url). Emits the public /find-job/{jobAdId} route and corrects the skill's own stale /job/ documentation, which redirects anonymous visitors into the MitID login flow.
Co-authored-by: oscarbol09 <80536682+oscarbol09@users.noreply.github.com>