Add schema to events

Problem/Motivation

Events do not appear in Google searches when searching for "tech events near me" or similar.

Upon investigation, it appears that schema does not exist for event pages.

Steps to reproduce

Contrib Half Hour (Thursdays, 1pm Eastern US) → shows “No items detected” via the Rich Results Test

Proposed resolution

Add Schema to events pages and views.

Remaining tasks

1. Determine Technical Approach options
2. Implement feature

User interface changes

TBD

API changes

TBD

Data model changes

TBD