Port PR from PBS-Java: Events: Add new request.ext.prebid.events.enabled toggle

[cross-repo-issue-creation]

A PR was merged over on PBS-Java

• Events: Add new request.ext.prebid.events.enabled toggle prebid-server-java#4479
• timestamp: 2026-04-30T18:44:39Z

[bsardo]

Is this relevant to Go? There was a lot of traction on events logic and then it went dormant.