feat: add physical animal care delivery

docs/FOOD_STORAGE_ARCHITECTURE.md

@@ -16,12 +16,22 @@ ResourceStateRecord (berry bush)
 Food is conserved across source, carried inventory, and pantry. It leaves the
 world only when consumed.
 
+Animal care extends the same ownership chain without a parallel counter:
+
+```text
+village_pantry
+    -> feed_animal pickup moves one food into exact caretaker inventory
+    -> existing carried-food prop derives from that inventory
+    -> delivery consumes caretaker inventory into exact named animal
+```
+
 ## Authority
 
 - `StorageStateRecord` owns pantry and woodpile contents and capacity.
 - `SimNPC.inventory` owns carried item amounts.
 - `VillageEconomy` performs deposit, withdrawal, consumption, and
-  definition-backed completion-cost transactions.
+  definition-backed completion-cost transactions, including exact
+  all-or-nothing animal-care pickup and inventory removal.
 - `SimulationManager` coordinates action lifecycle and exposes the transaction
   results to presentation.
 - `village.food` and `village.wood` are synchronized aggregate views used by
@@ -40,6 +50,8 @@ Successful extraction, deposit, withdrawal, and consumption also append
 structured economic facts. See [the economic event stream](ECONOMIC_EVENTS.md).
 Active NPCs display a small food sack while their authoritative inventory
 contains food; this is presentation derived from state, not a second inventory.
+NPC animal care therefore uses the same visible prop between pantry pickup and
+the claimed goat.
 
 ## Failure behavior
 
@@ -50,23 +62,28 @@ Transactions apply the amount actually available:
 - player extraction is limited to storage capacity until player inventory
   exists, so overflow remains at the source;
 - withdrawal cannot exceed pantry contents;
+- animal-care pickup succeeds only when the complete missing cost is available;
 - eating succeeds only when the NPC carries one food.
 
-If another NPC empties the pantry first, withdrawal returns zero and the NPC
-replans on its next idle tick.
+If another caretaker empties the pantry first, animal-care pickup records the
+definition-backed shortfall, transfers nothing, releases only the losing
+caretaker's exact animal claim, and replans. A caretaker that already carries
+the unit never consults pantry stock again before delivery.
 
 ## Deliberate limits
 
-This slice contains one authored pantry and one carried item type. It does not
-yet add:
+The current bounded economy has one authored pantry and one woodpile with
+simple food/wood stacks. It does not yet add:
 
 - player inventory;
 - storage reservations or access capacity;
 - multiple households or ownership;
 - spoilage, item quality, weight, or stack definitions.
 
-Economic transfer events exist, but event retention, denial/depletion facts,
-witnesses, and social interpretation are deliberately deferred.
+Objective event history, depletion and blocked-task facts, bounded per-NPC
+knowledge, proximity witnesses, and the first social consequences now exist.
+Long-run event archival, generalized denial facts, wider witness models, and
+broader social interpretation remain deferred.
 
 Those should extend the transaction boundary rather than mutate counters
 directly.