drop node state

merge commit 74a8208 introduced commits
c51d212 and
ee25097, which modify the node state.
When the node state is cached, however, deserialization now fails. This
commit drops the current node state to ensure deserialization always
works.

libs/sdk-core/src/persist/migrations.rs

@@ -433,7 +433,8 @@ pub(crate) fn current_migrations() -> Vec<&'static str> {
         UPDATE channels SET local_balance_msat = spendable_msat;
        ",
        "DELETE FROM cached_items WHERE key = 'gl_credentials'",
-       "DELETE FROM cached_items WHERE key = 'last_sync_time'"
+       "DELETE FROM cached_items WHERE key = 'last_sync_time'",
+       "DELETE FROM cached_items WHERE key = 'node_state'"
     ]
 }