v2.20.0

What's Changed

• Advertise OAuth capabilities and clarify runtime contract layers by @asim in #2166
• Bound active assistant polling and back off reconnect failures by @asim in #2167
• Add TypeScript and Python SDKs with durable assistant recovery by @asim in #2168
• Simplify TypeScript and Python clients to ask and call by @asim in #2169
• Verify durable requests across release-binary crashes by @asim in #2170
• Make the Notes proto contract authoritative by @asim in #2171
• Implement Tasks using its proto contract by @asim in #2172
• Implement Bookmarks and Alerts using proto contracts by @asim in #2173
• Implement Notify using its proto contract by @asim in #2174
• Bound client polling and prevent repeated rate-alert episodes by @asim in #2175
• Remove the static Groups card from the feed by @asim in #2176
• Consolidate model composition and inference in internal/model by @asim in #2177
• Use model composition for runtime LLM and service selection by @asim in #2178

Full Changelog: v2.19.0...v2.20.0