ci(oxa types): build for oxa-core

Author: nokome

.github/workflows/primary.yml

@@ -50,7 +50,8 @@ jobs:
         run: pnpm codegen all
 
       # Typecheck generated code (TypeScript via tsc, Python via ty, Rust via cargo)
-      - run: pnpm typecheck
+      # Note: oxa-types-ts uses build (not typecheck) to produce dist/*.d.ts for oxa-core
+      - run: pnpm build
         working-directory: packages/oxa-types-ts
       - run: uv run ty check src/
         working-directory: packages/oxa-types-py