Compression

[LINCKODE]

Adds support for ZSTD compression and new quorum data format.

• Added configuration option to choose Compression setting.
• Added alternative Protobuf object to represent new quorum diff format.
• Added new endpoint to return the re-assembled quorum data, from the new more minimal format. (/v2/ticks/{tick_number}/quorum)
• Added methods to read/write new quorum data format to/from db.
• Updated README.md to warn about potential incompatibilities between archiver versions.

Process of migrating an Archiver instance:

1. Stop archiver.
2. Run the archiver-db-migrator tool, specifying the path of the old database, and the path of where to store the new database directory. Wait for the process to stop.
3. Rename the old database directory to something else, and the new directory to the old name, thus we don't need to modify the archiver configuration.
4. Update the archiver version in the docker compose file.
5. Start archiver.

[0xluk]

Process of migrating an Archiver instance: section should reside in a separate md file which should be referenced from the general readme.md

[0xluk]

why do we still have v1 and v2? this version of archive should be used with a clean(migrated) version of storage so we shouldn't keep any reference to the old quorum format, or am I missing something?