Feast script audit

A strategy script runs with the user's money, so it passes two stages first. Both are bound to the file's sha256: any edit is a new file and needs a new audit.

FL is the runtime's command, as in the feast-league skill:

node "${FEAST_LEAGUE_RUNTIME:-$HOME/.feast-league/runtime}/src/league/bin.mjs"

Stage 1: the static rules (deterministic)

FL audit <file.mjs>

The runtime parses the file; it never runs it.