A.6.3.RT:5.4.c - Boundary to coarsened dashboard view

An incident worksheet carries three causal branches, two confidence bands, and an open ambiguity; a dashboard tile foregrounds only cache-failover evidence. If the tile needs a declared narrower use, non-admissible action, and explicit return to the worksheet, A.6.3.CSC is primary. The tile is not causal proof, service-status verdict, or action cue.