feat: add provenance-aware npc communication

docs/ACTION_SYSTEM_ARCHITECTURE.md

@@ -72,8 +72,11 @@ does not recompute decisions. At completion it atomically pays any
 definition-backed stored-resource cost before applying the action effect. A
 late shortfall suppresses the effect and records a `task_blocked` fact. The
 manager also captures actor/nearby knowledge before forwarding newly recorded
-events into `RelationshipSystem`. It exposes knowledge, relationship, and cause
-queries without moving social authority into UI.
+events into `RelationshipSystem`. When an NPC arrives beside a worker at the
+same non-storage activity site, the manager may transfer one direct known fact
+and applies its consequence only to that newly informed listener. It exposes
+knowledge, provenance, relationship, and cause queries without moving social
+authority into UI.
 
 ### VillageEconomy
 
@@ -94,6 +97,10 @@ queries without moving social authority into UI.
   history;
 - initially observes successful food-deposit events for the actor and living
   NPCs within a fixed proximity radius;
+- preserves first acquisition as performed, witnessed, communicated, or
+  legacy, with a stable source NPC ID for direct communication;
+- permits one performed/witnessed fact to cross one co-located social hop, but
+  does not relay communicated or ambiguous legacy facts;
 - captures evidence only when the event happens, never from current positions
   during restore;
 - answers deterministic known-event and knower queries without formatting