feat: add paired goat care

docs/BUILD_IN_PUBLIC_PLAN.md

@@ -811,15 +811,20 @@ Completed:
     exact mid-route state through schema-v11 restore and presentation
     unload/reload. The animal feature assets now live together under
     `world/animals/goat/`, while ignored docs no longer create import sidecars.
+42. `Jajce Goat Pair 09`: Zora now joins Dunja as a second named, stable animal
+    with an authored private shelter and deterministic access to the shared
+    pasture. Simultaneous hunger selects the nearest available loaded goat,
+    preserves two exact reservations through save/restore, and feeds only the
+    named target. Private shelter ownership remains loaded-world context; no
+    herd system, animal index, or schema bump was introduced.
 
 Next:
 
-1. Add one second named goat with its own stable state, authored shelter
-   context, and deterministic use of the shared pasture. Prove nearest
-   feed-target selection and independent reservations when both animals are
-   hungry.
+1. Playtest the named pair and record one concrete gameplay or scaling need
+   before extending the animal model.
 2. Keep breeding, products, herd scheduling, animal spatial indexing, and
-   active/abstract simulation LOD deferred until two real animals require them.
+   active/abstract simulation LOD deferred unless that evidence requires one
+   of them; otherwise return to the broader milestone sequence.
 
 Do not start with GIS data, a full city, a large asset pack, or more NPC
 mechanics. The next proof is a beautiful stage for the systems that already