Complete integer schema version consumer readiness

docs/consumers/README.md

@@ -20,6 +20,11 @@ The YAML under [`testdata`](../../examples/consumers/testdata) is loaded by the
 executable examples and ordinary tests. It contains no private application data,
 credentials, network calls, or dependency on a sibling checkout.
 
+The Notarius-shaped fixtures deliberately load both `version: 4` and
+`version: "4"` into the same string-backed application field. Its version checker
+still owns the supported identifier; fractional numeric input and unsupported
+integer identifiers remain negative examples.
+
 ## Happy path
 
 An application defines ordinary types and passes one explicit source. Optional