PAUSE counted toward runtime_seconds equally with RUNNING, inflating
hours-based maintenance thresholds (rod lube, belt check, nozzle clean)
by however long overnight or extended pauses lasted. Maintenance items
track mechanical wear, which is zero while paused, so the predicate
now excludes PAUSE. Field-comment and docstring trail across main.py /
models/printer.py / maintenance.py updated to match. Existing
runtime_seconds values cannot be retroactively split — only future
accumulation is fixed.
Adds 3 regression tests pinning PAUSE non-accumulation, RUNNING
accumulation, and the FINISH state's last_runtime_update clear
(prevents idle-time back-bill when the printer next goes RUNNING).
