010 T7: Probes → `games/<name>/probes/` + `shared/probes/`, all S15 preconditions atomic nf-q4uu ← Beads

Twinned from https://github.com/cfsh/ninefold/issues/1007 by tools/beads/import_github.py's reconcile pass.

From 010-co-located-tests-and-probes.md's task table (design 010). - Note: independent of T1–T6; parallel-safe