feat(scum): rebuild plugin-owned management data

plugins/examples/scum-server-plugin/companion/dispatcher_test.go

@@ -42,6 +42,9 @@ func (*adapterFixture) PatchGameState(context.Context, map[string]any) (map[stri
 func (*adapterFixture) DeliverReward(context.Context, map[string]any) (map[string]any, error) {
 	return nil, nil
 }
+func (*adapterFixture) StartEvent(context.Context, map[string]any) (map[string]any, error) {
+	return nil, nil
+}
 func (*adapterFixture) NotifyPlayer(context.Context, map[string]any) (map[string]any, error) {
 	return nil, nil
 }
@@ -92,3 +95,21 @@ func TestRegistryRejectsUndeclaredAndMalformedPayloads(t *testing.T) {
 		}
 	}
 }
+
+func TestRewardPayloadValidationRequiresItemsOrOperations(t *testing.T) {
+	validBase := map[string]any{"grantId": "grant-1", "playerId": "76561198000000001"}
+	for name, payload := range map[string]map[string]any{
+		"items":      {"grantId": validBase["grantId"], "playerId": validBase["playerId"], "items": []any{map[string]any{"catalogCode": "BPC_Apple", "quantity": float64(1)}}, "operations": []any{}},
+		"operations": {"grantId": validBase["grantId"], "playerId": validBase["playerId"], "items": []any{}, "operations": []any{"#SetFamePoints 250"}},
+		"both":       {"grantId": validBase["grantId"], "playerId": validBase["playerId"], "items": []any{map[string]any{"catalogCode": "BPC_Apple", "quantity": float64(1)}}, "operations": []any{"#SetFamePoints 250"}},
+	} {
+		t.Run(name, func(t *testing.T) {
+			if err := validateCommandPayload("reward.deliver", payload); err != nil {
+				t.Fatalf("valid reward payload was rejected: %v", err)
+			}
+		})
+	}
+	if err := validateCommandPayload("reward.deliver", map[string]any{"grantId": "grant-empty", "playerId": "76561198000000001", "items": []any{}, "operations": []any{}}); err == nil {
+		t.Fatal("reward payload with no items or operations was accepted")
+	}
+}