build(deps): bump torch from 2.0.1+cpu to 2.8.0 in /sagemaker-train/tests/data/script_mode

[dependabot]

Bumps torch from 2.0.1+cpu to 2.8.0.

Release notes

Sourced from torch's releases.

PyTorch 2.8.0 Release Notes

• Highlights
• Backwards Incompatible Changes
• Deprecations
• New Features
• Improvements
• Bug fixes
• Performance
• Documentation
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[github-actions]

Claude finished @lucasjia-aws's task in 38s —— View job

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PR Review: bump torch to 2.8.0

• Read the PR diff (/tmp/pr.diff)
• Reviewed surrounding test-data scripts for compatibility impact
• Posted review

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This is a Dependabot bump of torch in a test-data requirements file (sagemaker-train/tests/data/script_mode/requirements.txt) — used by the script_mode training-job test fixture, not by the SDK's runtime dependencies. Low risk overall. A couple of observations worth noting:

1. Dropped the +cpu local version specifier

-torch==2.0.1+cpu
+torch==2.8.0

The old pin used the CPU-only wheel (+cpu). The new pin has no local suffix, so on Linux pip will resolve the default wheel, which is CUDA-enabled and much larger (pulls in nvidia-* CUDA packages). Since this fixture only trains a tiny nn.Linear model on CPU (custom_script.py falls back to CPU when torch.cuda.is_available() is false), the CPU wheel was intentional and lighter for CI. Consider keeping it explicit: torch==2.8.0+cpu (still available via the -f .../torch_stable.html index). Not a correctness bug, just image/download size.

2. torch.load default change (2.6+)
custom_script.py:51 calls torch.load(model_dir + "/model.pth") without weights_only. PyTorch 2.6 flipped the default to weights_only=True. Here the file is a plain state_dict saved via model.state_dict(), so loading under weights_only=True still works — no action needed, just flagging that the behavior default shifted across this jump (2.0 → 2.8).

Nothing blocking. The change is functionally fine for the test fixture; the +cpu suffix is the only thing I'd optionally restore.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 42.74%. Comparing base (0d8f539) to head (fef4571).
⚠️ Report is 6 commits behind head on master.

❌ Your project check has failed because the head coverage (42.74%) is below the target coverage (65.00%). You can increase the head coverage or adjust the target coverage.

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HEAD has 3 uploads less than BASE

Flag	BASE (0d8f539)	HEAD (fef4571)
	4	1

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #5328       +/-   ##
===========================================
- Coverage   69.79%   42.74%   -27.06%     
===========================================
  Files         548      384      -164     
  Lines       65822    51248    -14574     
===========================================
- Hits        45943    21905    -24038     
- Misses      19879    29343     +9464     

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