Provide link to event in email blasts

[pdafeedbackform]

When sending an email blast for an event, provide a link to the event in the email so that recipients can easily get to it (for updating their rsvp, double checking details, etc)

Metadata

• Route: /
• User Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5.2 Mobile/15E148 Safari/604.1 Brave

Submitted by user id: aee29791-6245-4cf1-9074-98c3c134f041

[timkwist]

🔧 Draft PR created: #1424