Release 1.15.0

openvibe-shared/perf-budget (roadmap WS-T task 1): size budgets for a page's first load, measured from the running server with no browser. measure({ base, path }) fetches the page and every same-origin script and stylesheet it names. It reports the files and their raw and brotli KB; cross-origin assets are listed as external and not weighed. check(m, budgets) lists the budgets exceeded, and format() is the failure message.