Fix: no audio out — resume AudioContext inside the click gesture

Diagnosed with Puppeteer (real Chrome, default autoplay policy): Csound booted, decoded the found sound, compiled and performed — but the AudioContext stayed suspended, so nothing reached the speakers.

• Fix: resume a shared AudioContext synchronously as the FIRST thing in play() (before any await), and hand that same context to Csound via Csound({audioContext}).

▶ Play it: Rail Replacement Rapture — a bed-heavy genre where the found-sound layer carries the room https://stellate.app/?genre=transitwave&seed=6363&path=749.12536,768.12569,730.12569&xdur=13.122

8d336f9 https://github.com/aboard-io/stellate/commit/8d336f9beec1e4ce81feea57637e58f47e0c4e8f