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- lpr-camera.md: "503 Device Busy" can be PERSISTENT (main-stream saturation on the G3H) — the real fix is sub-stream selection, not just retry. - device-status-monitoring.md: QR reader health was false-healthy (hardcoded "ready") until the ICMP-ping fix; document the push-device monitoring model. - log entries for both 2026-06-26 sessions. Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V