docs: address PR review comments

- Clear outputs from differential-privacy.ipynb tutorial notebook
- Move Python 3.11 syntax-compatibility note from README to CONTRIBUTING
- Fix cu128 -> cu129 extras mismatch in docker.md comparison table
- Align getting-started prerequisite line with markdown style rules

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: Aaron Gonzales <aagonzales@nvidia.com>

Author: binaryaaron

CONTRIBUTING.md

@@ -544,6 +544,10 @@ Before submitting a PR:
 
 For detailed style guidelines covering Python, markdown, Dockerfiles, shell scripts, testing, and docstrings, see [STYLE_GUIDE.md](STYLE_GUIDE.md).
 
+### Python Version Compatibility
+
+Although the default development/runtime interpreter is Python 3.13, source code must remain Python 3.11 syntax-compatible until the NMP platform moves its base Python version to 3.12. Do not use Python 3.12-only syntax such as PEP 695 `type` statements or bracketed generic class/function parameters in shared package code yet.
+
 ### Formatting, Linting, and Type Checking
 
 Use `make` targets instead of running `ruff` or `ty` directly. The targets use pinned tool versions from `.mise.[toml|lock]` (installed via `make setup`) and check all tracked files.

README.md

@@ -14,8 +14,6 @@ Read detailed usage below, or jump to the documentation with [Getting Started](h
 - NVIDIA GPU (A100 or larger) for training and generation
 - Linux only -- macOS, Windows, and Apple Silicon are not supported for training or generation. A CPU-only install is available for development and configuration validation.
 
-> Contributor note: although the default development/runtime interpreter is Python 3.13, source code must remain Python 3.11 syntax-compatible until the NMP platform moves its base Python version to 3.12. Do not use Python 3.12-only syntax such as PEP 695 `type` statements or bracketed generic class/function parameters in shared package code yet.
-
 ### Installation
 
 ```bash

docs/developer-guide/docker.md

@@ -263,7 +263,7 @@ To reduce size:
 | Aspect | `Dockerfile.cuda` | `Dockerfile.test_ci` |
 |--------|-------------------|----------------------|
 | Base | `nvidia/cuda:12.9.1-runtime-ubuntu22.04` | `python:3.13-slim` |
-| Extras | `cu128` + `engine` | `cpu` + `engine` |
+| Extras | `cu129` + `engine` | `cpu` + `engine` |
 | GPU | Required | Not needed |
 | Stages | `tools` / `deps` / `runtime` / `dev` | `setup` / `install-deps` |
 | Use case | Training, generation, evaluation | CPU-only unit tests and CI checks |