* feat: add token expiration notifications via email, critical alerts, and webhooks
- Monitor loop checks for tokens expiring within 7 days and sends
email notifications to token owners. Tracks notification state via
new `expiry_notified` column on the token table to avoid duplicates.
- When tokens expire and are deleted, owners are also notified.
- Critical alerts (in-app UI) are gated behind a new instance setting
`critical_alerts_on_token_expiry` (off by default); emails are
always sent regardless of the setting.
- Add TokenExpiringSoon and TokenExpired webhook message variants for
workspace webhook integrations.
- Frontend: show expiration badges and a warning banner on the tokens
table for tokens expiring within 30 days.
- Exclude session and ephemeral tokens from all notifications.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* refactor: use separate token_expiry_notification table for dedup
- Replace `expiry_notified` column on token table with a dedicated
`token_expiry_notification` table (token, expiration)
- Insert notification row on token creation via shared
`register_token_expiry_notification()` helper
- Delete notification row atomically when sending the notification
- Clean up orphaned rows in `delete_expired_items()`
- No FK constraint to avoid cascade overhead on token deletions
- Add index on expiration column for efficient range queries
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix: calendar-based expiration badge and move notification cleanup
- Fix daysUntilExpiration to compare calendar dates instead of time diff
- Move notification row cleanup from delete_expired_items to
check_expiring_tokens to keep it off the hot path
- Use simple expiration <= now() index scan instead of NOT EXISTS join
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
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