Name a read's context its group, route and branches, deleting surveyAt

todo.md

@@ -36,9 +36,6 @@ on 2026-09-29 a fifth time (Navigation 6.9, Locality 5.2, Shape 6.1, Self-suffic
 
 This round, in order:
 
-- Move the fold to `reads.go` and the verdicts to `drawfence.go`, deleting
-  `readsurvey.go`; name a read's context its `group`, `route` and `branches`, deleting
-  `surveyAt`, and let the README's Layout and `doc.go` follow.
 - Name what a read sits under `branches`, the rows pinned with their ancestors and the
   rows of whole draws without, both load-bearing, and fold `check`, `checkFamilies`,
   `replayPairs`, `checkFamilyPair` and `alternatives` into one pairwise loop over