build: Bump TE to 2.14

[ko3n1g]

What does this PR do ?

• Disabled tests:
  • tests/functional_tests/test_groups/training/test_megatron_fsdp.py::TestMegatronFSDP::test_fsdp_pretrain_with_checkpoint: https://github.com/NVIDIA-NeMo/Megatron-Bridge/actions/runs/23531676427/job/68502572249

Changelog

• Add specific line by line info of high level changes in this PR.

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Additional Information

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Summary by CodeRabbit

• Chores
  • Updated transformer-engine dependency to a newer version for improved compatibility and performance.

[coderabbitai]

📝 Walkthrough

Walkthrough

Updated the transformer-engine dependency pinned Git commit hash in pyproject.toml from 287770466f0f4433052260a765db5ff7b8be1320 to 71bbefbf153418f943640df0f7373625dc93fa46, changing which revision the uv package manager will install.

Changes

Cohort / File(s)	Summary
Dependency Version Update pyproject.toml	Updated transformer-engine Git commit hash in tool.uv.override-dependencies to pin a different source revision.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• build: bump TE #2059: Updates the TransformerEngine VCS pin in pyproject.toml to a different commit hash.
• build: Bump TE 2.13 #2753: Modifies the same pyproject.toml transformer-engine override with a Git commit bump.

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 bumps Transformer Engine to 2.14, a significant dependency update that could affect numerics and convergence, but lacks required test results and validation evidence in the description.	Add test results, convergence validation, and performance benchmarks (if applicable) to the PR description demonstrating no regression with the new TE version.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'build: Bump TE to 2.14' directly describes the main change: updating the transformer-engine (TE) dependency from one commit hash to another (with the implied version being 2.14).
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ko3n1g/build/bump-te-214

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