build: Bump TE on 2.12

[ko3n1g]

What does this PR do ?

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Additional Information

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Summary by CodeRabbit

• Chores
  • Updated transformer-engine dependency to a newer version.

[coderabbitai]

📝 Walkthrough

Walkthrough

The transformer-engine dependency git commit hash in pyproject.toml is updated from d9b7fc5770a88af06e2e9c2bd97b550614c3a69f to 5671fd3675906cda1ade26c24a65d3dedd88eb89 in the uv override-dependencies configuration.

Changes

Cohort / File(s)	Summary
Dependency Override Update pyproject.toml	Updated transformer-engine git commit hash in [tool.uv].override-dependencies to point to a new commit.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• build: Bump mlflow #2279: Modifies the same transformer-engine override entry in pyproject.toml as part of formatting and adding other overrides.
• cp: build: Bump modelopt and TE (2304) into r0.3.0 #2314: Also updates the transformer-engine git revision in pyproject.toml's override-dependencies.
• build: bump TE #2059: Changes the TransformerEngine VCS revision in pyproject.toml by updating the commit hash.

Suggested reviewers

• chtruong814
• thomasdhc

🚥 Pre-merge checks | ✅ 3 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Test Results For Major Changes	⚠️ Warning	PR contains critical transformer-engine dependency upgrade affecting FP8 training and numerics, plus extensive CI/CD infrastructure changes, but description lacks test results, validation, or regression confirmation.	Complete PR description with comprehensive testing documentation including numerical stability validation, performance benchmarks, convergence confirmation, and CI/CD results for transformer-engine upgrade.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'build: Bump TE on 2.12' clearly describes the main change: updating the Transformer Engine (TE) dependency in the build configuration for version 2.12.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch ko3n1g/build/bump-te-212-2

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