int_gtfs_quality__rt_validation_outcomes.key uniqueness test failing

[cal-itp-sentry[bot]]

Sentry Issue: CAL-ITP-DATA-INFRA-145X

DbtTestFail: test.calitp_warehouse.unique_int_gtfs_quality__rt_validation_outcomes_key.6c4eae7fe1 - Got 1 result, configured to fail if != 0

This is failing because there are hours with null extracts; I think the underlying RT outcomes macro needs to use base64 directly from the hive path rather than from the extract metadata.