feat: turn on emit_filing_account by default

Else, we are dependent on the order of postings determined by Python

beancount_reds_importers/libtransactionbuilder/transactionbuilder.py

@@ -54,7 +54,7 @@ def build_metadata(self, file, metatype=None, data={}):
         # This 'filing_account' is read by a patch to bean-extract so it can output transactions to
         # a file that corresponds with filing_account, when the one-file-per-account feature is
         # used.
-        if self.config.get("emit_filing_account_metadata"):
+        if not self.config.get("emit_filing_account_metadata", False):
             acct = self.config.get("filing_account", self.config.get("main_account", None))
             return {"filing_account": acct}
         return {}