backstage release v2.94.1

(agent-platform) Key a streamed artifact by its id so the latest reply does not show twice by @marians — On a session’s page, the agent’s latest reply, or a tool call it just made, no longer shows twice for a few seconds at the end of a turn.
(agent-platform) Let a streamed item advance its polled copy instead of being dropped by @marians — On a session’s page, a tool’s result shows as soon as the agent receives it, and the agent’s reply is never shown cut off part-way.
(plans-backend) Cache /content per person, ref and path for 60 s by @teemow — Hive’s History tab and plan pages open faster when reopened: the backend keeps each plan file it read from GitHub for 60 seconds, per person. A file changed on GitHub shows within a minute.

Full Changelog: https://github.com/giantswarm/backstage/compare/v2.94.0...v2.94.1