fix(truelayer): Skip unsupported account types

Some providers (e.g. barclaycard) do not support both "accounts" and
"cards". If the truelayer importer comes across such a provider, it will
fail to fetch the unsupported account type, and omit that from the
config

If the key is omitted from the config, we'll try to read from an invalid
key when we later look for all transactions

autobean/truelayer/importer.py

@@ -183,6 +183,9 @@ def _fetch_balances(
     def _fetch_all_transactions(self) -> list[Directive]:
         entries: list[Directive] = []
         for type_ in ACCOUNT_TYPES:
+            if not type_ in self._config.data:
+                continue
+
             for account_id, account in self._config.data[type_].items():
                 if not account['enabled']:
                     continue