Fix live mode going silent after the intro

csound inputMessage schedules p2 as a delay FROM the moment the message is received, not as absolute score time. The scheduler was sending absolute seconds, so section 1 (injected at t~0) played on time but every later section fired ~(its injection time) late, leaving silent gaps

• Fix: send p2 = eventAbsoluteSeconds - currentScoreTime(now). Verified with Puppeteer: audio now continuous across section boundaries (RMS 0.05-0.18, no gaps; was dropping to ~0.005 between sections).

▶ Play it: Mercury Interrogation — where the harmony organ has the least anywhere to hide https://stellate.app/?genre=bebop&seed=5860&path=694.13834,713.13867,675.13867&xdur=13.122

c97295c https://github.com/aboard-io/stellate/commit/c97295c45b34d244209284c70390645cacf5524f