Features
- feat(mailer): add AWS SES and SMTP providers with auto-detect fallback (#4710)
Improvements
- improvement(mcp): per-server tool queries + negative cache (#4715)
- improvement(kb-connectors): multi-select fields + Slack bot/app message extraction (#4711)
- improvement(search-replace): pass down to subblocks (#4712)
- improvement(hubspot): OAuth-native polling trigger replacing webhook flow (#4705)
- improvement(oauth): coalesce token refresh + cache terminal failures (#4706)
Bug Fixes
- fix(oauth): follower last-chance read after poll deadline (#4718)
- fix(files): RFC 5987 encode Content-Disposition filenames (#4713)