core: reduce path requirement to compute spacing resource uses #7808
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We used to require path until it includes a zone that isn't necessary for the train. But we don't need to know which precise block it is, it doesn't need to be included in the path.
Fix #7788, there's a little more explanation there with a fancy drawing
Change summary: we rely on the
followingZoneState
parameter ofSignalingSimulator.evaluate()
to figure out if a zone affects the signal (if the end of the path has been reached). This lets us peek one zone further than before.