deliverBriefingEventAnchored reads time.Now().UTC() for its safety-net
check, so synthetic TickDay calls never advanced CurrentDay on D2-b
expeditions — DaysAtEnd / SUEnd stayed at start values. Short-circuit
in TickDay: when isEventAnchored, fire nightRolloverBurn → optional
applyCampRest (Standard, Rough fallback, skipped on low-SU) →
nightRolloverDrift(briefAt). Mirrors pitchAutopilotCamp Night=true.
Production paths untouched.
Unblocks D5-d retune of phase5BDailyBurnRatePct and the class corpus
re-run.
