Fixed `add_fact_to_channel` integration test.
Fixed `add_fact_to_channel` integration test.

daukantas/factlink-core,Factlink/factlink-core,Factlink/factlink-core,Factlink/factlink-core,daukantas/factlink-core,daukantas/factlink-core,daukantas/factlink-core,Factlink/factlink-core