Release v0.30.19

What's Changed

• docs(tools): route agents to Monitor from Bash and BashOutput descriptions by @cpacker in #3785
• feat(reflection): double-write completion state to Cloud by @carenthomas in #3798
• feat(cli): add sandbox file transfer commands by @carenthomas in #3800
• fix(headless): target conversation cloud sandbox by @carenthomas in #3801
• fix(channels): keep typing active across queued turns by @letta-integration[bot] in #3786
• refactor(channels): share interactive control request handling by @letta-integration[bot] in #3803
• chore: bump version to 0.30.19 by @github-actions[bot] in #3804

Full Changelog: v0.30.18...v0.30.19