v0.62.0: Bedrock/Vertex support, session-scoped settings, readiness-fix command, and Rate Limits

New features

- Bedrock/Vertex support - Added Bedrock and Vertex support for Claude Sonnet 4.6 and Opus 4.6
- Session-scoped settings - Model, autonomy, and reasoning settings are now session-scoped instead of global
- /readiness-fix command - New slash command to automatically fix issues found in readiness reports
- Rate Limits UI - Added UI handling for Rate Limit notifications
- README requirement for Missions - Missions now require README updates before completion

Bug fixes

- MCP reload prevention - Avoided unnecessary MCP reloads on non-MCP settings changes
- Custom model migration - Prevented no-op custom model migration writes
- Autonomy persistence - Preserved autonomy level when spec sessions persist