avoid spam automatic emails

[DennisTurco]

Summary

Currently, if a user triggers an application crash multiple times, multiple unnecessary emails are sent to us.

Details

The email-sending logic has been updated with two additional checks:

• If the same error (same payload and application version) has already been reported, the email is not sent again.
• A minimum waiting period (configurable, default 7 days) must pass between two critical error emails.

An email is sent only if:

• The error has not already been reported for the current version, and
• The configured minimum time has passed since the last critical error email.

Checklist

• Changes have been tested locally
• Logic is complete at 100%
• Design/UI is complete at 100%
• No breaking changes (or they are documented)