adding mapping for edu events and elastic search

[stephiescastle]

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Description

Addresses part of https://github.com/nasa-jpl/www/issues/272

• Adds Event metadata to elastic search results
• Does not add Event filters (see https://github.com/nasa-jpl/www/issues/272#issuecomment-2319501552)

Instructions to test

Recommend testing when in www.

Tested in the following environments/browsers:

Operating System

• macOS
• iOS
• iPadOS
• Windows

Browser

• Chrome
• Firefox ESR
• Firefox
• Safari
• Edge

[jamesray]

💊