fix(update): inline schemas in managed handoff runtime (#144031)

fix(update): inline schemas in managed handoff runtime (#144031)

Use the canonical schema-inline plugin in the production handoff build so relocated helpers load without neighboring SQL assets. Cover the registered production graph through real staging and an isolated Node load.

Worked on by: @IWhatsskill

Co-authored-by: IWhatsskill <284122573+IWhatsskill@users.noreply.github.com>