ecec0b6073
Strengthen test to prove the job's paused state remains unmodified when pause/unpause is rejected for a downloading job. Tests now seeds paused=true, attempts paused=false, verifies 400, and fetches from DB to assert paused is still true — catching regressions that would mutate before the guard check. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>