Rework UpdateAlarmsData command

- renames
- get rid of unneeded classes (use "...Container" typealias intead)
- get rid of defaultdict
- get rid of "| None" typing on harvested data
  (api result is guaranted, otherwise we have exception,
  there is no optional result from node.api  call)
- make decline_voting_rights "DeclineVotingRightsRequest | None"
- add docstring under member definition
- separate _sanitize and _assert methods
- common code for _assert methods
- add account name assertion for owner history result
- remove unused _get_account