TensorStudio 1.9.0

TensorStudio 1.9.0 completes roadmap section 5: Neural Network Building Blocks. It adds native grouped conv2d, native conv_transpose2d, native embedding lookup, Conv1d, DepthwiseConv2d, ConvTranspose2d, BatchNorm1d/2d, LayerNorm, Embedding, adaptive/global pooling, GELU/ELU/SELU/SiLU/Mish activations, nn.init initializers, expanded losses, module buffers, buffer-aware state_dict support, and model summaries. Local validation passed: ruff, mypy, pytest, examples, mkdocs build, test_all.py, python -m build, twine check, benchmark_all --check-thresholds, bench_matmul, and clean wheel smoke install.