RoleMapFor answers for the Mine Launcher (MineLayerRoles) so roles-migrate and roles-backfill no longer
disagree on it; BackfillMapFor is deleted. Count, MinRange, DamageSpread and the reactor Modifier join their
kind maps, and the backfill points a varying stat's unnamed Quality term at its role without touching its
range. DeathCluster, Flak Gun, GT 3K, plight and both MoveOnPros join the backfill set (CB-R1 forces them).
RolesBackfill(apply, root) mirrors PiratesFaction so tests can replay it on a scratch catalog.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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