feat: create admi controlled event service so control the filters in the client apps through server

title: "feat(backend): create admi controlled event service so control the filters in the client apps through server "

🚀 Feature Request

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Write a new events schema and event service which are admin only features where admin can create a event. Pages in the corpus-cient-app which are genrally used for the evnts such as doc digitization page will call this events route and the filters which the admin defined for this events will automatically be used for the record fetching api calls such as /next-for-review. With this the admins can control the record fetching on the client side on server side

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📌 Follow semantic issue titling convention: <type>(<scope>): <description> (e.g., feat(records): support video uploads or feat(auth): implement password reset).