fix(ci): build core before worker typecheck

Author: cursoragent

.github/workflows/ci.yml

@@ -21,7 +21,8 @@ jobs:
         with:
           node-version: 22
           cache: pnpm
-      - run: pnpm install --frozen-lockfile=false
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm --filter @csvshape/core build
       - run: pnpm lint
       - run: pnpm typecheck
       - run: pnpm test