Every task now states that ncu needs GPU performance counters (ERR_NVGPUCTRPERM without them) and that nsys is the fallback; task.toml records the SYS_ADMIN requirement for the runner.
26 tasks previously gated at tol=0. Ten emit only integers and stay exact. The other sixteen carry a float payload and now accept a real tolerance -- 1e-3 for bf16, 1e-5 for fp32. The ceiling comes from the metric: GB/s is credited from the shape-derived byte count, so re-encoding the payload narrower moves less data than it is paid for. Measured fp8 round-trip 2.7e-2 (27x the bf16 gate) and fp16-for-fp32 2.1e-4 (21x the fp32 gate) -- both still rejected, while a kernel at 0.4x the gate passes.
26 legacy task.toml files normalized to schema 1.1.
Reorganise: group 313 tasks into 17 families under tasks/, generators under tools/ (part 7)
