Kura 0.8.1

Kura 0.8.1 restores compatibility with older Tuist CLIs when pulling cache artifacts. If Kura’s token introspection reports a token as inactive for a project-scoped request, it now falls back to the legacy /api/cache/access authorization path that older clients already rely on. Account-scoped Kura authorization still uses introspection, and requests are rejected if the fallback also refuses the token. This fixes the case where a CLI logs in before creating a new throwaway project, then gets a 401 on the first artifact fetch because the embedded cache grants did not include that project.