Hiring cafe extractor (#192)

* feat(hiringcafe): register new source across shared/server/client enums

* feat(hiringcafe-extractor): add browser-backed Hiring Cafe dataset extractor

* feat(orchestrator): integrate Hiring Cafe discovery service into pipeline

* feat(orchestrator-ui): add Hiring Cafe to source availability and run estimates

* chore(hiringcafe): wire CI/docker and add extractor documentation

* chore(format): apply biome formatting for Hiring Cafe integration

* add original websites

* coomints

* number or null

docs-site/docs/extractors/ukvisajobs.md

@@ -7,6 +7,8 @@ sidebar_position: 5
 
 UKVisaJobs is the most complex extractor because authenticated sessions are required.
 
+Original website: [my.ukvisajobs.com](https://my.ukvisajobs.com)
+
 ## Big picture
 
 Two layers: