Refresh Vendor-A interface package integrity metadata

[Copilot]

The Vendor-A NPU interface example already included verification vectors and explicit unsigned signature state, but its integrity manifest no longer matched the current package artifacts. This updates the recorded package digests so the example is self-consistent again.

• Integrity manifest

  • Refreshed interfaces/vendor-a-npu-evidence-layer-package/signatures/content-digests.yaml
  • Updated SHA-256 values for each tracked package artifact to match the current file contents

• Verification coverage preserved

  • Kept the existing normalization vectors for:
    • nominal multi-record normalization
    • unmapped vendor error preservation
    • required-field rejection
  • Left the example signature state unchanged as explicitly unsigned in manifest.yaml

• Artifact consistency

  • Ensures the manifest, verification vectors, and digest metadata describe the same package state

artifacts:
  - path: manifest.yaml
    digest: 98688f55b404bea0a5bf877ca5a75aad17a0cc84b04b072e95e606aad2cba469
  - path: tests/normalization-vectors.yaml
    digest: 393d246f8cf2274cc4b39913a9583acbc7bd4cfe830be87bff8cb36a2551ec95

• Fixes [FEATURE] Verify Interface Package Artifacts #9

[daeyoung-jeong-lge]

replication with #31