Fix music Note creation returning a null mutation result by sending the root-field and pando request headers. The existing operation, payload and public API are retained.
Private GraphQL headers now stay local to each request, preventing music Note metadata from leaking into later calls.
Validated with actual music Note creation, read-back, deletion and absence confirmation in both SDKs, plus regression and packaging checks. Runtime dependencies, Android pins and default transports are unchanged.
Also includes the previously merged MkDocs Material 9.8.1 and Ruff 0.17.4 development-tool updates.
Thanks @pushAndPray69 for the detailed report and official-app request capture.
Related: #2949