Arcadia Patch Create 1.4.2

Conservative Create crash guards.\n\n- Guard invalid continuous OBB collision manifolds where Create can expose a null axis during contraption collision.\n- Reject unreadable or corrupted contraption NBT before Create dereferences invalid state.\n- Discard invalid contraption entities during load instead of crashing the server tick.\n\nBuild verification: ./gradlew.bat clean build.