chore: remove sample portfolio module

src/adapter/outbound/identifier/CLAUDE.md

@@ -37,8 +37,7 @@ build choices) live in [README.md](README.md).
 - Persistence or web technology (JPA/Hibernate/Spring Data/Spring Web) — ArchUnit
   `identifier_adapter_does_not_depend_on_other_adapters_or_bootstrap`;
   `.claude/hooks/ca_import_gate.py` G4 가 쓰기 시점에 차단.
-- inbound adapters, persistence adapters, other outbound leaves, `app-bootstrap`,
-  `sample-portfolio`.
+- inbound adapters, persistence adapters, other outbound leaves, or `app-bootstrap`.
 - External IO (HTTP / messaging / cache / DB) — that belongs in `adapter-outbound`.
 
 ## Test