Unlike the work that was done to migrate SearchSatisfaction schema from legacy to modern, migrating [[ https://meta.wikimedia.org/wiki/Schema:MobileWikiAppiOSEditHistoryCompare | MobileWikiAppiOSEditHistoryCompare ]] will require creating a new schema (and then stream) in [[ https://gerrit.wikimedia.org/g/schemas/event/secondary/ | schemas/event/secondary ]].
It should reference the core identifiers fragment and list `device_id` and `session_id` in `required`, which are filled-in by EPC library. It will have an `action` enum, a `primary_language` string, and an `is_anon` boolean which are filled-in by instrumentation.
**Proposed schema name**: /analytics/mobile_app/ios/edit_history (alternatively we can move it up one dir if we don't want it to be an iOS-exclusive schema)
**Proposed stream name**: mobile_app.ios.edit_history