v0.4.3

Fixed

• HP MFPs answer 404 for GET /eSCL/ScanJobs/{uuid} and only report job
  state inside ScannerStatus/Jobs. JobInfo now falls back to that list, so
  these devices get live page progress, state_reasons
  (JobCompletedSuccessfully, …), the final Aborted check, and correct
  "job still alive" detection when NextDocument answers 503 between sheets.
• Page count no longer doubles when the device counter and the document pull
  both count the same page; the assembled PDF's page count is authoritative.
• 503 purge skips jobs the device already lists as finished (HP keeps them
  as history).