Prepare inspected static Metal runtime inventory for macOS staging

tools/embeddinggemma2/build_runtime.py

@@ -10,6 +10,7 @@ import shutil
 import subprocess
 import sys
 from runtime_provenance import fingerprint, UPSTREAM_COMMIT
+from macos_runtime import inspect as inspect_macos
 
 ROOT = Path(__file__).resolve().parents[2]
 TAG = "b11461"
@@ -215,6 +216,15 @@ def main():
         os.replace(temporary, directory / "runtime-libraries.json")
     if linux_dispatch(args.backend):
         bundle_linux_libraries(build, provenance)
+    if sys.platform == "darwin" and args.backend in {"auto", "metal"}:
+        worker = build / "searchi-gemma-worker"
+        inventory = inspect_macos(worker)
+        with worker.open("rb") as stream:
+            inventory["worker_sha256"] = hashlib.file_digest(stream, "sha256").hexdigest()
+        inventory["build_provenance"] = provenance
+        temporary = build / "runtime-libraries.json.partial"
+        temporary.write_text(json.dumps(inventory, indent=2), encoding="utf-8")
+        os.replace(temporary, build / "runtime-libraries.json")
     print(f"Runtime build complete: {build}")