v0.1.6

Fixes multiple CLI behaviors uncovered by real-instance testing:

• documents.search supports --query
• comments.update requires --data-json (valid comment data)
• stars.update encodes index as string
• file-operations download helper + ID handling
• clearer handling for optional endpoints missing on server
• documents.restore supports --revision-id / --use-latest-revision
• documents.add-user prevents self-invite

See: #20

What's Changed

• fix: align real-instance command payloads by @casey-brooks in #20

Full Changelog: v0.1.5...v0.1.6