docs: mark upgradeBadgeSubscription's badgeRequest as to be dropped; trim store purchase comments

src/Simplex/Chat/Badges/Service.hs

@@ -92,7 +92,7 @@ data BadgeServiceCommand
         upgrade :: Maybe BadgeUpgrade -- upgrade store 1-time badge
       }
   | BSCUpgradeBadgeSubscription
-      { badgeRequest :: BadgeRequest,
+      { badgeRequest :: BadgeRequest, -- TODO [badges] drop when implemented: a client-stated expiry leaves the week's anonymity set
         payment :: ServicePayment, -- store payments only
         balance :: BadgeBalance
       }

src/Simplex/Chat/Store/Badges.hs

@@ -72,7 +72,6 @@ data BadgeStash = BadgeStash
     masterKey :: BadgeMasterKey
   }
 
--- | The row a stash is kept in, which a purchase bought with it references.
 data BadgeStashRef = BSRCodeRedemption Int64 | BSRStoreReceipt Int64
 
 -- | A store and its own id for one transaction. The evidence is not the key: the store may sign it