* Fix double serialization of masterchain; increase sync_blocks_before
* Improve logging in DownloadState
* Write persistent state directly to file instead of a buffer
* Don't keep ref to masterchain state in AsyncStateSerializer
* Sparse state serialization over longer period
Co-authored-by: SpyCheese <mikle98@yandex.ru>
- added some fift scripts for the config change proposal voting
- added validator-engine-console support for the config change proposal voting
- additional sanity checks in catchain
- unsafe slow catchain resync method