feat: add ON EMAIL and ON CHANGE keywords for event-driven monitoring
- Add ON EMAIL keyword with FROM/SUBJECT filters
- Add ON CHANGE keyword with account:// syntax (gdrive, onedrive, dropbox, local)
- Add TriggerKind::EmailReceived (5) and FolderChange (6)
- Add migration 6.1.3_bot_hierarchy_monitors with:
- email_monitors, folder_monitors tables
- email_received_events, folder_change_events tables
- user_organizations table
- Bot hierarchy: parent_bot_id, enabled_tabs_json, inherit_parent_config
- Add 26 unit tests (12 on_email, 12 on_change, 2 trigger_kind)
- Update PROMPT.md with weekly maintenance checklist
- Zero warnings, zero errors
Rodrigo Rodriguez (Pragmatismo)
84117ce5b2