Document corpse backpack MVP decision

AGRARIAN_DEVELOPMENT_ROADMAP.md

@@ -665,7 +665,11 @@ Target deliverable: A small group can join a server, spawn into one biome, gathe
   the Ground Zero MVP spawn/home location, revives with partial health,
   stabilizes hunger/thirst/body temperature, clears acute injury conditions,
   and leaves family/inheritance respawn for later generational milestones.
-- [ ] Add corpse/backpack placeholder if needed.
+- [x] Add corpse/backpack placeholder if needed. Decision: no physical
+  corpse/backpack actor is needed for the 0.1.J MVP respawn loop because death
+  inventory loss is not active yet. Future corpse/backpack recovery is reserved
+  as a persistent, server-owned, interaction-gated death-recovery record once
+  inventory loss and decay rules exist.
 - [ ] Add replicated death feedback.
 
 ## 0.1.K Wildlife Prototype