refactor: bootstrap crate, thin server/worker binaries

.github/workflows/ci.yml

@@ -44,7 +44,7 @@ jobs:
       # Layering guards. These live in the Makefile and were previously local-only,
       # so a PR could go green in CI while violating them.
       - name: guards
-        run: make check-appcontext check-handler-deps check-handler-repos check-presentation-adapters check-federation-off-social check-sqlite-is-ap-free
+        run: make check-appcontext check-handler-deps check-handler-repos check-presentation-adapters check-federation-off-social check-binaries-are-thin check-sqlite-is-ap-free
 
   docker:
     name: Build & Push Docker Image