`removeInvite/:_id` endpoint still uses legacy `addRoute` pattern

[NAME-ASHWANIYADAV]

The removeInvite/:_id DELETE endpoint (apps/meteor/app/api/server/v1/invites.ts) still uses the deprecated API.v1.addRoute pattern.

It should be migrated to the new chained .delete() API pattern with AJV validation, consistent with other already-migrated endpoints in the same file (listInvites, findOrCreateInvite).

Files involved

• apps/meteor/app/api/server/v1/invites.ts
• packages/rest-typings/src/v1/invites.ts