Add annotated inference metadata companion

Add a comment-rich inference_metadata.annotated.yaml that parses to the same metadata object as the canonical file, and link it from the model card. The canonical inference_metadata.yaml is unchanged. When provenance hashes README.md, refresh that hash and add the annotated-file hash without changing producer/source identity.

README.md

@@ -94,3 +94,9 @@ sessions are the supported runtime today. See `evidence/runtime_limitations.json
 ## License
 
 Apache-2.0, inherited from the source model. See `SOURCE_LICENSE.md`.
+
+<!-- inference-metadata-annotation:start -->
+## Annotated inference metadata
+
+Review [`inference_metadata.annotated.yaml`](./inference_metadata.annotated.yaml) for inline explanations of this package's workflow, tensor/state/cache contracts, and fail-closed omissions. [`inference_metadata.yaml`](./inference_metadata.yaml) remains the canonical machine-authored contract; automated validation confirms both files parse to the same metadata object.
+<!-- inference-metadata-annotation:end -->