chore(dashboard-agent): drop UAT scripts, merge release notes

Author: kathiekiwi

.server-changes/agent-chat-code-renderer-fallback.md

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+---
+area: webapp
+type: feature
+---
+
+The AI assistant now gives grounded answers about queues: it names the runs holding concurrency slots, which limit is blocking, and accurate wait times, across all projects in your organization. It also recovers with a clear error instead of hanging on a stuck response, and no longer breaks when code highlighting fails to load.