- Add health_check method to Submissions::UploadToPaperless (GET /api/ with 3s timeout)
- Add Rails initializer that logs connection status at boot
- Add INFO logging to UploadToPaperlessJob (start, success with doc count/task IDs)
- Add paperless-ngx status section to Settings → Notifications page
(live connection check with 60s cache, DaisyUI badges: Connected/Unreachable/Not Configured)
- Add specs for health_check method (5 scenarios) and system specs (3 scenarios)