- processEmail: wrap DB lookup and ChatContact create/update in try-catch
so any exception sends an error message to the user instead of silently
failing and leaving state stuck at await_email
- sendOtp: inform user if mail sending fails so they know to wait/retry
- TelegramWebhookController: top-level try-catch returns 200 always so
Telegram never retries on server errors (retries caused duplicate state resets)
- ChatContact canal_id cast to string to avoid type mismatch on insert
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
