This release introduces new candidate fields and improved application status tracking.

Added professionalLinks to the candidate object in GET /applications and GET /applications/{id}.
Includes type (e.g. 'LINKEDIN') and url. Sorted alphabetically by type. Only non-null URLs are returned.
Added state and currentStage fields in GET /applications and GET /applications/{id} responses.
- state (enum): SCREENING, QUALIFIED, OFFER, HIRED, REJECTED
- currentStage (object): contains id, name, index.
  - name (enum): SCREENING, INTERVIEW, CASE_STUDY, PHONE_CALL, ASSESSMENT, OFFER, HIRED
Added state (enum) as a query parameter in GET /applications.
Deprecated qualified (query parameter and response field) in GET /applications and GET /applications/{id}. Still supported for backward compatibility.