chat: cross-reference groupInfoQueryFields and getGroupAndMember_

Two helpers redundantly maintain the same g.* column list. A future
g.* addition must be applied to both sites; the cross-reference
comments flag this for maintainers. A proper refactor (reusing
groupInfoQueryFields from Connections.hs's inline SELECT) is out of
scope for this branch.

src/Simplex/Chat/Store/Shared.hs

@@ -782,6 +782,7 @@ toBusinessChatInfo _ = Nothing
 groupInfoQuery :: Query
 groupInfoQuery = groupInfoQueryFields <> " " <> groupInfoQueryFrom
 
+-- Mirrored in Store/Connections.hs getGroupAndMember_ — keep column lists in sync.
 groupInfoQueryFields :: Query
 groupInfoQueryFields =
   [sql|