nx_energy_probe_test.nx

nx_energy_probe_test.nx -- exercise the real-hardware probe end to end: detect the node's energy source, measure a fixed workload's real consumption in that source's native unit, and report HONESTLY (joules only from a joule source; cycles labeled as the speed proxy when no power sensor exists). This is the "real hardware, any hardware" half of the triangle -- on a RAPL/battery node it yields real energy; on a bare node it falls to the universal cycle counter. Known answer: detection returns a usable source (never NONE) AND the live counter advances over real work. exit 0.