Save used keytoken in messages

scnserver/TODO.md

@@ -56,12 +56,14 @@
      * [X] compat simply uses default-keys
      * [X] CRUD routes for keys
      * [X] KeyToken.messagecounter
-     * [ ] update old-data migration to create token-keys
+     * [x] update old-data migration to create token-keys
      * [ ] unit tests
 
  - We no longer have a route to reshuffle all keys (previously in updateUser), add a /user/:uid/keys/reset ?
    Would delete all existing keys and create 3 new ones?
 
+- TODO comments
+
 #### PERSONAL
 
  - in my script: use `srvname` for sendername