chore(fmt): gofmt cleanup on files touched by audit-2026-05-11 fix bundle

Whitespace alignment drift surfaced by gofmt -l after merging 7 fix branches.
Pure formatting, no semantic change. Pre-existing master drift in
internal/auth/oidc/{domain/types.go, integration_keycloak_rotate_test.go,
test_discovery.go} left untouched — that's separate tech debt.

internal/api/handler/audit.go

@@ -284,5 +284,3 @@ func (h AuditHandler) ExportAudit(w http.ResponseWriter, r *http.Request) {
 			"actor_id", actorID, "rows", len(events), "err", err)
 	}
 }
-
-