Monte Carlo tolerance analysis (synchronous, metered)

Scope: solve. Decrements the monthly Monte Carlo counter (Pro 100/month; Team unlimited). Trials are clamped to the plan cap, to a size budget of 120 000 node-trials, and to what one request can finish inside the 300 s timeout — a trial is a full solve and a solve is superlinear in node count, so a large design gets fewer trials than its node-trial budget alone would allow. meta.clamped says so and meta.clampedBy says which (plan limit, design complexity or request time budget); on the last, meta.notice points at POST /v1/jobs/monte-carlo, which runs the trials you asked for in slices with no request timeout. Pass options.seed for a reproducible run; meta.seed echoes the seed used either way.