The MobileWikiAppiOSLivingDoc schema is not currently used, and there is a task for the removal of the related feature code from the app T305562

Part 1 PR - https://github.com/wikimedia/wikipedia-ios/pull/4468

Recap of action items from our meeting with Android and @SNowick_WMF for converging the iOS and Android session metrics:

1. To match Android a little more, iOS will add some basic session ID persistence (user defaults should be fine), so that when a user terminates and comes back within the timeout, the same session ID is used.
2. iOS will increase its timeout from 15 minutes to 30 minutes.
3. As of this time, iOS will not keep track of app activity timestamps against web view scrolling or native screen appearance, like Android. Let's think about this work in a followup task when we consider breadcrumb work (mentioned in this task description).
   • This means potentially, if a user doesn't interact with the app for 30 minutes+ but it is kept foregrounded, iOS will keep the same session ID the next time they interact with the app whereas Android would have created a new session ID. This is because iOS only evaluates the need for a new session ID upon foregrounding.
4. iOS will update the SessionFunnel to send data to Android's MEP session schema (rename work will be in T331481). iOS will comment out sending page_load_latency_min and page_load_latency_max for now (just in case we decide to send it again later). iOS will no longer send category, label, or action in this funnel. iOS will no longer send a session_start or session_end action. Instead this session data event will now be sent whenever a sessionID is regenerated or reset (so maybe within EventPlatformClient's resetSession() method), remove previous calls where session_start and session_end were sent.
5. For the session_data object in the Android schema, we will only send page_load_latency_ms for now.

Additional PRs:

https://github.com/wikimedia/wikipedia-ios/pull/4512
https://github.com/wikimedia/wikipedia-ios/pull/4513

@Mazevedo - Following up on migration - I'm not sure if we listed as needed to migrate but for Watchlists design review we will indeed need to migrate over MobileWikiAppiOSNavigationEvents. This may be in progress and I haven't seen it yet but we've been asked to track additional toolbar engagement while users are in 'article view' and we will need to verify that the events we are tracking include those clicks. This should be spun off into a new ticket once we verify the schema is being migrated. Thanks!

These changes will be deployed as part of the 7.3.0 release but will be verified by analytics post-release