Release v0.30.6

What's Changed

• feat(channels): add per-channel Slack mention gating by @ezra-letta in #3658
• fix(listener): restore self-hosted registration override by @AriWebb in #3663
• fix(local): wire OpenAI-compatible provider into local backend by @just-cameron in #3674
• fix(cron): preserve active listener execution by default by @overlord-letta in #3665
• fix(listener): expose agent MemFS to mod callbacks by @overlord-letta in #3673
• fix(updater): await startup update in smoke test by @overlord-letta in #3672
• fix(reflection): isolate child processes from mods by @amysguan in #3676
• fix(listener): forward safe terminal turn errors by @overlord-letta in #3678
• fix(listener): bridge external tools on remote connections by @overlord-letta in #3679
• fix(memfs): reset inherited credential helpers by @cpacker in #3670
• refactor(prompts): defer cron mechanics to the scheduling-tasks skill by @cpacker in #3683
• fix(cron): fall back to a local schedule when Cloud cannot reach this computer by @cpacker in #3682
• fix(listener): sanitize remaining terminal errors by @overlord-letta in #3680
• chore: bump version to 0.30.6 by @github-actions[bot] in #3681

Full Changelog: v0.30.5...v0.30.6