//! Node-level ONNX backend conformance tests — split into focused modules.
//!
//! Tests have been split across:
//! - conformance_math.rs (tests 1–15: arithmetic + reductions)
//! - conformance_nn.rs (tests 16–21, 36–37, 40: NN activations + norms)
//! - conformance_shape.rs (tests 22–28: reshape, transpose, concat, etc.)
//! - conformance_conv.rs (tests 29–31: conv2d + pooling)
//! - conformance_indexing.rs (tests 32–34, 38–39: gather, where, onehot, clip, identity)
//! - conformance_quant.rs (test 35: quantize/dequantize round-trip)