docs: document food storage transaction loop

docs/LEARNING_ROADMAP.md

@@ -633,14 +633,21 @@ Completed foundations:
 
 The practical next sequence is:
 
-1. Build location-based food storage, inventory, and transactions.
-2. Emit structured economic events while making one NPC visibly gather, carry,
+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.
+
+The practical next sequence is:
+
+1. Emit structured economic events while making one NPC visibly gather, carry,
    store, retrieve, and eat food.
-3. Add save-slot persistence and explicit schema migrations before schedules
+2. Add save-slot persistence and explicit schema migrations before schedules
    or social state expand.
-4. Resume Terrain3D sculpting, runtime integration, and the simulation-garden
+3. Resume Terrain3D sculpting, runtime integration, and the simulation-garden
    beauty pass.
-5. Add stylized character and profession readability plus the reason
+4. Add stylized character and profession readability plus the reason
    inspector.
 
 This order strengthens the simulation while regularly producing visible