testbench-install

Use this skill whenever the testbench Pi itself needs to be built, installed, updated, or have code deployed to it — a fresh SD card, a first install.sh run, pushing a changed controller module to a running bench, or diagnosing why a change had no effect. This is about the machine, not the instruments: the other testbench-* skills drive a bench that already works. Triggers on "install the testbench", "set up the…