Release v0.29.6

What's Changed

• feat(channels): allow explicit Discord bot handoffs by @overlord-letta in #3426
• fix(channels): support Telegram private bot topics by @overlord-letta in #3211
• fix(app-server): return pagination metadata from conversation_messages_list by @cpacker in #3526
• feat(sandbox): export memory worker confinement launcher by @cpacker in #3525
• chore: bump version to 0.29.6 by @github-actions[bot] in #3527

Full Changelog: v0.29.5...v0.29.6