Add hide_missing_ids filter to transaction queries

- Add hide_missing_ids parameter to database functions to filter out transactions without internalTransactionId
- Update API routes to support the new filter parameter
- Update unit tests to include the new parameter
- Add opencode.json configuration file

tests/unit/test_api_transactions.py

@@ -166,6 +166,7 @@ class TestTransactionsAPI:
             min_amount=-50.0,
             max_amount=0.0,
             search="Coffee",
+            hide_missing_ids=True,
         )
 
     def test_get_transactions_empty_result(