POST /api/v1/jobs                         multipart: template, data
PUT /api/v1/jobs/{id}/configuration      checked field mappings
POST /api/v1/jobs/{id}/preview            PDF preview
POST /api/v1/jobs/{id}/process            queue processing
GET /api/v1/jobs/{id}                     state and progress
GET /api/v1/jobs/{id}/result              completed ZIP
POST /api/v1/jobs/{id}/cancel             request cancellation
DELETE /api/v1/jobs/{id}                  remove inactive job