Advanced Download Features

[Integer-Ctrl]

The current client supports basic downloads, but several advanced scenarios are missing.
Currently supported downloads include:

• File
• Version of an artifact
• Artifact (downloads latest)
• Group (downloads all latest artifacts)

This issue proposes enhancements for extending download functionality.

• Download of Account
  • Downloads all latest artifacts from all groups that the account/user owns
  • Should recursively resolve groups under the user’s namespace
  • Note: Read feature 2 below before implementing, since version handling applies here too
• Download of specific or multiple versions
  • Downloading an artifact, group or user (or account) should use the latest version of an artifact by default
  • Introduce a new CLI option (e.g. --version), for example:
    • --version latest downloads only the latest artifacts (default)
    • -- version all: downloads all versions of artifacts
    • --version 2025-10-14 downloads specific version if available
  • When downloading a user, group, or artifact, default to the latest version if not specified
• Download entire Databus
  • Add functionality to mirror the entire Databus
  • Should respect the same --version CLI option for control over versions

[kurzum]

Moves shasum to #28