Minimal signing flow changes for TRUC channels

The acknowledgment for the effort in retrieving relevant citations indicates that there's an exploration or research component involved, suggesting that the information or insights being discussed are part of a broader investigative or analytical effort within the realm of PTLCs or related technologies. This exploration could be aimed at enhancing or understanding mechanisms that could benefit from the fast forward concept, specifically in how it might be applied to improve or innovate within the existing frameworks of PTLCs.