Add TODO comment for legacy LSM cache cleanup prefix

Author: piatoss3612

apps/extension/src/error-boundary.tsx

@@ -61,7 +61,7 @@ const ErrorBoundaryView: FunctionComponent = observer(() => {
         "store_queries/",
         "store_prices/",
         "store_ibc_curreny_registrar/",
-        "store_lsm_currency_registrar/",
+        "store_lsm_currency_registrar/", // TODO: LSM registrar removed — keep for legacy cache cleanup, remove later
         "store_gravity_bridge_currency_registrar/",
         "store_axelar_evm_bridge_currency_registrar/",
       ];