docs(plan): confirm core does not depend on app

Author: spacemeowx2

agent-docs/ARCH_REFACTOR_PLAN.md

@@ -21,7 +21,7 @@ This document turns the proposed Clean/Hex refactor into a commit-friendly check
 ## 2) Dependency Rules (must-haves)
 
 - [x] Domain crates (`rd-interface`, `rd-derive`) must not depend on Core, Adapters, or App crates.
-- [ ] Core crate (`rabbit-digger`) must not depend on App crates; avoid depending on Adapters long-term.
+- [x] Core crate (`rabbit-digger`) must not depend on App crates; avoid depending on Adapters long-term.
 - [ ] Adapters (`rd-std`, `protocol/*`) must not depend on Core or App crates.
 - [ ] App (`rabbit-digger-pro`) may depend on Core and a _bundle_ crate; avoid direct dependencies on individual protocol crates.