[wieslawsoltes]

Problem

A completed HTTP exchange was treated as a successful connected resource regardless of its status. In the VS Code OSS package, an optional missing vsda.js returned 404 text/plain with body Not found; WebScene evaluated that body as JavaScript and emitted Uncaught SyntaxError: Unexpected identifier 'found'.

Change

• reject connected script, stylesheet, and other document-owned HTTP resources unless the final response status is 2xx
• preserve the existing 304 cached-body revalidation path
• preserve Fetch semantics: 4xx/5xx responses still resolve with status and body
• evict rejected response cache entries and emit load:http-status-failed
• add a focused native CTest covering a 404 script, 500 stylesheet, and Fetch of the same 404 body

Closes #870

Validation

• cmake --build /private/tmp/ws870-native --target webscene_native_engine_tests -j 6
• ctest --test-dir /private/tmp/ws870-native -R '^webscene_native_connected_http_status$' --output-on-failure
  • 1/1 passed in 0.79 seconds
• git diff --check