feat: runtime manager

lobby/PLAN.md

@@ -1441,3 +1441,12 @@ The implementation is complete only when all of the following hold:
   generator
 - `go test ./... -race` passes for the lobby module, the user module, the
   `pkg/notificationintent` module, and the integration module
+
+## Note: Runtime Manager Envelope Evolution
+
+Subsequent changes to the `runtime:start_jobs` and `runtime:stop_jobs`
+envelopes — specifically the addition of `image_ref` to the start envelope
+and the addition of the `reason` enum to the stop envelope — are owned by
+the Runtime Manager implementation plan, not by this document. See
+[`../rtmanager/PLAN.md`](../rtmanager/PLAN.md) §«Stage 06. Lobby publisher
+refactor». No new stages are added here for that work.