feat(docs): [#23] add A100 validation materials

[MengjieLee]

Document the verified A100 onboarding run and include the companion notebook so the validation notes are easy to review and reproduce.

Summary by CodeRabbit

• Documentation
  • Added an NVIDIA A100 environment validation guide with observed system details, verification commands, and results
  • Added a benchmark profiling notebook covering an A100 smoke run and guidance for follow-up validation
  • Updated the documentation navigation to link to the new A100 validation page
• Chores
  • Updated .gitignore to exclude local workspace and related artifacts

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: f4c32271-a033-46cf-b005-eec4540b9101

📥 Commits

Reviewing files that changed from the base of the PR and between 659801c and eec5928.

📒 Files selected for processing (1)

• docs/.nav.yml

✅ Files skipped from review due to trivial changes (1)

• docs/.nav.yml

---

📝 Walkthrough

Walkthrough

Adds local-workspace entries to .gitignore, registers a new NVIDIA A100 validation page in docs/.nav.yml, and introduces two new files: index.md (verified environment details, smoke-test results, validation scope) and a100_benchmark_notes.ipynb (benchmark method, captured profiling output, CSV report inspection, and a fused-backend reporting issue with a proposed fix).

Changes

A100 Validation Documentation

Layer / File(s)	Summary
Gitignore and nav wiring .gitignore, docs/.nav.yml	Ignores local_workspace/, .agents/, .claude/, skills-lock.json, and ultragoal/; adds the A100 validation page to the Getting Started nav section.
A100 validation index page docs/getting_started/nvidia-a100-validation/index.md	New page recording the verified GPU/driver/PyTorch/CUDA environment, environment probe snippet, passing smoke-test and GRPO commands with outputs, strict mkdocs build result, validation scope/non-claims, and a next-checks fused-logp command.
A100 benchmark notebook docs/getting_started/nvidia-a100-validation/a100_benchmark_notes.ipynb	New notebook with benchmark scope, method, nvidia-smi check, run_profile_suite.py invocation with captured logs and profiling table, CSV report loading into a Pandas dataframe, and a problem summary documenting the fused-backend fallback reporting issue with a proposed fix and regression-test plan.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐇 Hop hop, the A100 glows,
Its drivers and tensors in rows.
A notebook to show what passed and what fell,
A markdown to capture each benchmark's tale to tell.
The .gitignore tucks the local mess away,
While docs keep the validation here to stay! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: adding A100 validation materials (documentation and notebooks) to the repository.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}