- src/facade/rust -> src/engine/rust; package oakfacade -> oakengine
- crate-type += cdylib; module crates are real deps; linkage anchors
force-link module C ABIs into the dylib
- build.rs: -undefined dynamic_lookup for host-provided oakcore_*/fb_*
- nm: 749 oakengine_* + 687 module oak*_* exports; undefined set is
only the intended host-provided symbols
- worker/cli updated to the new path/name; undo test race fix