FRITZ'S RPG: BLACK CROWN 0.11.5 - COMPLETE MOUNTAIN MASS TEST

1. Remove older Fritz's RPG JARs and keep only this 0.11.5 JAR.
2. Remove the old exterior:
   /function fritzsrpg:structures/remove_ruined_forge
3. Place the new build:
   /function fritzsrpg:structures/place_ruined_forge
4. The mountain is now built from safe split fill commands. It should no longer be missing or reduced to floating snow shelves.
5. Inspect the full stepped mountain mass, side shoulders, snow caps, courtyard and gate.
6. Durnan and boss progression remain disabled during exterior approval.
