feat(multiplayer): expose server shutdown acknowledgement

server/api/store_adapters.go

@@ -74,6 +74,19 @@ func ServerRegistrarFromStore(db *sql.DB) ServerRegistrar {
 	return postgresServerRegistrar{db: db}
 }
 
+type postgresServerShutdowner struct{ db *sql.DB }
+
+func (p postgresServerShutdowner) ShutdownServer(ctx context.Context, binding domain.WorkloadBinding, reason, idempotencyKey string, now time.Time) error {
+	return store.RecordServerShutdown(ctx, p.db, binding, reason, idempotencyKey, now)
+}
+
+func ServerShutdownerFromStore(db *sql.DB) ServerShutdowner {
+	if db == nil {
+		return nil
+	}
+	return postgresServerShutdowner{db: db}
+}
+
 // WorkloadVerifierFromSignedToken builds WorkloadVerify from a control-plane
 // -owned signed token instead of a Kubernetes-projected JWT (see
 // workload/signed_token.go for why: it needs no live cluster to verify).