chore: remove sample portfolio module

src/adapter/outbound/persistence-jpa/CLAUDE.md

@@ -68,10 +68,9 @@ Adapters that serve one optional capability carry that capability's switch, unli
 module. The `fileserver` package is the current case: every `Jpa*` adapter there is annotated
 `@ConditionalOnProperty(prefix = "app.fileserver-platform", name = "enabled", havingValue = "true")`.
 
-Without the gate a composition root that merely includes this module builds those beans, and each of
-them needs collaborators only the Fileserver configuration supplies — which is how `sample-portfolio`
-came to fail on a `FileStateMachine` it has no use for. A store for a capability nobody enabled
-should not exist.
+Without the gate a composition root that merely includes this module builds those beans, although
+their collaborators exist only when Fileserver configuration is selected. A store for a capability
+nobody enabled should not exist.
 
 ## Allowed
 
@@ -174,7 +173,7 @@ framework-neutral `shared.error.PersistenceFailureException` carrying one of the
 Audit metadata (`created_at` / `updated_at` / `created_by` / `updated_by`, D3) is an
 infrastructure concern that must never reach `domain-core` (D2). It lives only on the
 `audit/AuditableEntity` `@MappedSuperclass`; a domain aggregate persistence entity opts in
-by extending it (D6 — e.g. the sample `WorkLogEntity`). The domain aggregate itself carries
+by extending it (D6). The domain aggregate itself carries
 zero audit fields, enforced by ArchUnit `domain_is_pure` (no `jakarta.persistence..`) plus
 `domain_entities_do_not_carry_audit_fields` (no `createdAt`/`updatedAt`/`createdBy`/`updatedBy`
 fields under `..domain..`).

src/adapter/outbound/persistence-jpa/src/test/java/dev/caskeleton/adapter/outbound/persistence/audit/AuditableEntityTest.java

@@ -11,8 +11,7 @@ import org.junit.jupiter.api.Test;
  * (feature-persistence-auditing-contract D1/D3/D4/D5).
  *
  * <p>Exercised through a tiny concrete subclass because {@link AuditableEntity} is a
- * {@code @MappedSuperclass} (JPA cannot instantiate it standalone, and the production subclass
- * {@code WorkLogEntity} lives in the sample module).
+ * {@code @MappedSuperclass} (JPA cannot instantiate it standalone).
  */
 class AuditableEntityTest {