skills(pm-dispatch): charter references — clause-② applicability, the shape-1 red exception, the two-layer landing, the three-class blocker rule, the director batch (#17942 chain, second half)

skills(pm-dispatch): charter references — clause-② applicability, the shape-1 red exception, the two-layer landing, the three-class blocker rule, the director batch (#17942 chain, second half) #4180