Release v0.27.4

What's Changed

• feat: add denial support to tool_start extension event by @carenthomas in #2704
• fix(tools): clarify Bash execution on Windows by @cpacker in #2712
• feat: pass response state ids through letta-code streams by @jnjpng in #2680
• fix: hide shell tool placeholder flash by @carenthomas in #2716
• refactor(extensions): extract diagnostics helpers by @carenthomas in #2705
• feat: add local connect providers WS command by @carenthomas in #2717
• feat: add local connect provider write commands by @carenthomas in #2719
• feat(extensions): add diagnostics report files by @carenthomas in #2718
• fix(channels): ignore Slack bot reaction echoes by @cpacker in #2722
• feat(extensions): write diagnostics on reload by @carenthomas in #2725
• fix(cli): reload runtime surfaces in place by @carenthomas in #2726
• chore: bump version to 0.27.4 by @github-actions[bot] in #2730

Full Changelog: v0.27.3...v0.27.4