docs: document economic event pipeline

docs/LEARNING_ROADMAP.md

@@ -637,17 +637,20 @@ Completed after the architecture gate:
 
 - location-based pantry state, NPC-carried food, and explicit
   deposit/withdraw/consume transactions;
-- a headless conservation scenario covering the complete food loop.
+- a headless conservation scenario covering the complete food loop;
+- deterministic structured economic events for extraction, deposit,
+  withdrawal, and consumption;
+- persisted event identity/history and a visible carried-food prop derived
+  from NPC inventory.
 
 The practical next sequence is:
 
-1. Emit structured economic events while making one NPC visibly gather, carry,
-   store, retrieve, and eat food.
-2. Add save-slot persistence and explicit schema migrations before schedules
+1. Add save-slot persistence, validation, and explicit migration fixtures
+   before schedules
    or social state expand.
-3. Resume Terrain3D sculpting, runtime integration, and the simulation-garden
+2. Resume Terrain3D sculpting, runtime integration, and the simulation-garden
    beauty pass.
-4. Add stylized character and profession readability plus the reason
+3. Add stylized character and profession readability plus the reason
    inspector.
 
 This order strengthens the simulation while regularly producing visible