Add maintained consumer migration examples

docs/internal/overview.md

@@ -42,13 +42,17 @@ module and package documentation boundary. Its implemented public primitives are
 - frozen-snapshot redaction and canonical effective output in `render.go`;
 - bounded immutable input applications, safe historical replay, detached explanation
   records, and deterministic human rendering in `explain.go`, with the
-  only upstream dumper integration isolated in `internal/yaml/write.go`.
+  only upstream dumper integration isolated in `internal/yaml/write.go`; and
+- a separate maintained `examples/consumers` package with four sanitized consumer
+  shapes, fixtures, domain validators, and runtime-boundary functions.
 
 The [configuration contract](../config.md) owns implemented input, schema, decoding,
 loading lifecycle, path imports, composition, profile/CLI overlay, version checking,
 recorded resolution, typed secret references/bootstrap, semantic validation,
 metadata, secret classification, redacted effective rendering, historical
 explanation, and ownership behavior.
+The [consumer adoption guide](../consumers/README.md) owns current application-fit
+and migration guidance.
 
 The source-extraction inventory records the application foundations assigned to
 future implementation work: