chore: consolidate migrations 6.1.1-6.1.3 into 6.1.0_enterprise_suite
- Integrate config ID type fixes (TEXT → UUID)
- Integrate connected_accounts, session_account_associations, account_sync_items
- Integrate bot hierarchy (parent_bot_id, enabled_tabs_json, inherit_parent_config)
- Integrate email_monitors, folder_monitors, folder_change_events, email_received_events
- Integrate user_organizations table
- Remove separate 6.1.1, 6.1.2, 6.1.3 migration folders
- Maximum version remains 6.1.0 per project standards