Improve item occurrence holder corrections

internal/modules/dnd/extract/itemoccurrences/prompt_assets_test.go

@@ -58,6 +58,17 @@ func TestPromptAssetsPrepareItemOccurrencePrompt(t *testing.T) {
 			t.Fatalf("prepared prompt contains obsolete evidence field %q: %s", obsolete, content)
 		}
 	}
+	for _, holderRule := range []string{
+		"| `discovered` | `null` | `null` |",
+		"| `acquired` | `null` | `party` or the named party member gaining possession |",
+		"| `lost` | `party` or the named party member losing possession | `null` |",
+		"| `consumed` | `party` or the named party member consuming the item | `null` |",
+		"| `transferred` | one named party member | a different named party member |",
+	} {
+		if !strings.Contains(content, holderRule) {
+			t.Fatalf("prepared prompt does not include holder rule %q", holderRule)
+		}
+	}
 }
 
 func TestPromptAssetsDoNotLeakIntoMetadata(t *testing.T) {