Drive-sync feature

[khnumdev]

I need to include support for pushing / downloading a local-db version to/from google drive
Requirements:

• The script must expose two commands: push and pull.
• As part of config, we need to put a setting where local-db binary is. It can be provided as setting or as a var when invoking the command.
• At the moment only Google Drive should be supported, but we can leave it open for the future (ex: OneDrive).
  • I think pydrive2 can be used for google drive; ensure invoke whatever is required to authenticate against your account

Behavior:

• push [VERSION] [-o]:

  • Run ./local-db stash VERSION.
  • If VERSION is omitted, use today’s date in format YYYY-mm-DD.
  • The stash produces a binary file named local-db-VERSION.bin.
  • Upload that file to Google Drive inside the /datastore folder.
  • If -o is passed, overwrite any existing file with the same name.

• pull [VERSION]:

  • If VERSION is omitted, download the latest backup from /datastore.
  • If VERSION is provided, download that specific file (local-db-VERSION.bin).
  • Save it locally and run ./local-db restore VERSION.

Other requirements:

• Fail fast if commands or files are missing.
• Script must be auditable, modular, and portable.
• Keep comments minimal, only if strictly necessary.
• It should be another command, following same format as the ones we have.
• As usual, add tests to cover as possible and ensure code is being compiled and executed without issues.