Tim Hadwen dc2fe2a8a0 Add USB hot-plug resilience and batch printing ...

USBPrinter no longer raises on init — the service starts and stays
running regardless of whether a printer is connected, reconnecting
automatically on demand.

Print jobs are now queued and batched: a 500ms collection window
groups consecutive labels into a single USB write, eliminating gaps
when printing multiple labels from InvenTree.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2026-01-26 16:07:59 +10:00

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