The pool law: sources may name a CLASS, not a sample

The repertoire program's mechanism (Paul: "not lock one bit of found sound into one genre"). A found/hits/vox sources list may now carry "pool:city" (3 seeded members) or "pool:city*N"

• SOURCE_POOLS ships with seven conservative classes drawn from the current corpus (city/road/industry/voices/nature/water/room)

▶ Play it: Loon Referendum → Leviathan Turnaround — a shuttle between the two genres this change names — the blend is the point https://stellate.app/?genre=canawave&seed=8631&path=1505.3720,430.7497&xdur=0.191

0cae4d3 https://github.com/aboard-io/stellate/commit/0cae4d3f9f306596af6e162618cb9dc7cbc3f90f