v0.9.9 - MDK

What's Changed

• Persist manual chat pin ordering by @erskingardner in #1149
• Implement terminal MLS group disbanding by @erskingardner in #1150
• Add rich agent inbound context and stable host baselines by @erskingardner in #1152
• chore(release): prepare 0.9.9 by @erskingardner in #1153

Full Changelog: v0.9.8...v0.9.9