CI: use gh api for cuda_bindings policy checks

Align the PR metadata workflow with repo conventions by using gh to paginate the PR file list, keeping the bindings restriction check simpler and easier to review.

Made-with: Cursor

Author: rwgk

.github/workflows/pr-metadata-check.yml

@@ -42,7 +42,6 @@ jobs:
           IS_DRAFT: ${{ github.event.pull_request.draft }}
 
           # API request context/auth
-          GITHUB_API_URL: ${{ github.api_url }}
           GH_TOKEN: ${{ github.token }}
           REPO: ${{ github.repository }}
         run: |
@@ -119,33 +118,23 @@ jobs:
 
           # Only NVIDIA organization members may change code under cuda_bindings.
           if [ "$AUTHOR_ASSOCIATION" != "MEMBER" ] && [ "$AUTHOR_ASSOCIATION" != "OWNER" ]; then
-            page=1
-            TOUCHES_CUDA_BINDINGS=false
-            while true; do
-              FILES_JSON=$(curl --silent --show-error --fail \
-                -H "Authorization: Bearer $GH_TOKEN" \
-                -H "Accept: application/vnd.github+json" \
-                -H "X-GitHub-Api-Version: 2022-11-28" \
-                "$GITHUB_API_URL/repos/$REPO/pulls/$PR_NUMBER/files?per_page=100&page=$page")
-
-              if jq -e '
-                .[]
-                | select(
-                    (.filename | startswith("cuda_bindings/"))
-                    or ((.previous_filename // "") | startswith("cuda_bindings/"))
-                  )
-              ' <<<"$FILES_JSON" >/dev/null; then
-                TOUCHES_CUDA_BINDINGS=true
-                break
-              fi
-
-              FILE_COUNT=$(jq 'length' <<<"$FILES_JSON")
-              if [ "$FILE_COUNT" -lt 100 ]; then
-                break
-              fi
-
-              page=$((page + 1))
-            done
+            if ! TOUCHES_CUDA_BINDINGS=$(
+              gh api \
+                --paginate \
+                --slurp \
+                --jq '
+                  flatten
+                  | any(
+                      .[];
+                      (.filename | startswith("cuda_bindings/"))
+                      or ((.previous_filename // "") | startswith("cuda_bindings/"))
+                    )
+                ' \
+                "repos/$REPO/pulls/$PR_NUMBER/files"
+            ); then
+              echo "::error::Failed to inspect the PR file list."
+              exit 1
+            fi
 
             if [ "$TOUCHES_CUDA_BINDINGS" = "true" ]; then
               ERRORS="${ERRORS}- **cuda_bindings policy**: See \`cuda_bindings/LICENSE\`. Only NVIDIA organization members may modify files under \`cuda_bindings/\` (PR author \`$PR_AUTHOR\` has association \`$AUTHOR_ASSOCIATION\`).\n"