Developer changelog updates for Aug 21, 2025

Summary

Added pull‑based diagnostics to the LSP and new DENO_INSTALL_ARCH environment variable with more informative install output.

Summary

Beta release of Duo Agent Platform for Visual Studio with AI chat and agent flows, plus GitLab Duo Self-Hosted enhancements: Code Review beta, custom review instructions, bring‑your‑own models, and hybrid model selection.