[DO NOT MERGE] test: verify PR coverage after #6082 routing fix

[jam-jee]

⚠️ DO NOT MERGE — verification PR

Re-verification now that #6082 is merged (PR unit-tests route to the CDK-managed ci-health-unit-test-v3 project, which runs --cov=sagemaker). No-op comment in all 4 submodule __init__.py files so every unit-test job runs and uploads coverage.

Expected

With #6082 live, the unit-test jobs now run the fixed buildspec, so uploaded coverage.xml is product-only (test files excluded).

Known remaining caveats

• fix: remove codecov after_n_builds so single-submodule PRs report coverage #6056 not merged — after_n_builds: 4 still on master, so this uses 4 submodules to produce 4 uploads.
• Uploader still bare — the CodeBuild codecov upload call still lacks -B/-P/-F, so uploads carry branch= empty / pr=false / no flags. If that's still the case, coverage may still not attach to the PR (and the 4 uploads may collapse to sessions=1). This PR will tell us definitively whether the uploader fix is the last remaining blocker.

Will be closed without merging once we read the result.

[github-actions]

Claude finished @jam-jee's task in 25s —— View job

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Review: verification PR (DO NOT MERGE)

I read the full diff at /tmp/pr.diff. This PR adds a single identical comment line to four submodule __init__.py files:

# No-op line to trigger CI for a Codecov verification post-#6082 (DO NOT MERGE).

• sagemaker-core/src/sagemaker/core/__init__.py
• sagemaker-mlops/src/sagemaker/mlops/__init__.py
• sagemaker-serve/src/sagemaker/serve/__init__.py
• sagemaker-train/src/sagemaker/train/__init__.py

Assessment

Nothing to flag. These are pure comment-only no-ops with no executable effect:

• Correctness — no code paths, imports, __all__ entries, or public interfaces are touched. No backward-compatibility impact for SDK consumers.
• Security / performance — N/A; comments only.
• Tests — none needed; there's no behavior change to cover.

One minor placement note (non-blocking): in sagemaker-train/.../__init__.py the comment lands at module level after the __getattr__ function definition, whereas in core and serve it follows a comment/__all__ block. Cosmetic only, and irrelevant given this branch is explicitly DO NOT MERGE and will be closed once the Codecov result is read.

The PR does exactly what it intends: force all four unit-test jobs to run so each uploads coverage. Looks clean for its stated purpose. ✅

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.81%. Comparing base (368a1a9) to head (59a0449).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6106   +/-   ##
=======================================
  Coverage   69.80%   69.81%           
=======================================
  Files         548      548           
  Lines       65855    65855           
=======================================
+ Hits        45970    45976    +6     
+ Misses      19885    19879    -6     

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