Snapshot of the live-set material and gig docs before the planned lib
restructure (dedup + a proper loaded ParVagues prelude so gF/gM/djf live in
one place, not re-defined in scratchpads). Also protects secrets: .env +
build noise now gitignored. Includes FOH_MASTER.md (master-bus hardening
recipe) and the ordered-202HD shopping update. Track edits: desire,
vague_de_crime, + new network_zero_un / bombe_dj / ca_fait_rien /
electric_hammer.