Migrate tests/test_aamped.py to npt.assert_allclose

[viknesh-ai]

Related to #1175

Continuing the file-by-file split — this one covers tests/test_aamped.py (the dask-parallel counterpart to test_aamp.py, same underlying comparisons just run through aamped/dask_client).

assert_almost_equal only checks a fixed absolute tolerance and NumPy's docs recommend assert_allclose instead. 29 call sites, structurally identical to test_aamp.py:

• Renamed comp_mp to cmp_mp per the standing convention (87 occurrences).
• Every comparison is against ref_mp/cmp_mp, which mix a float distance column with int index columns and so come back dtype=object — confirmed this before editing, same root cause as test_aamp.py. Cast both sides to float64 on every site.
• 27 of the 29 sites had no decimal= argument, so those use atol=1.5e-07. 2 sites explicitly used decimal=config.STUMPY_TEST_PRECISION — kept those as atol=1.5 * 10**-config.STUMPY_TEST_PRECISION rather than flattening to the literal, since that's a genuinely different (looser) tolerance.

Ran the full file twice locally (normal mode and JIT-disabled/CUDA-simulated, matching test.sh coverage) — 102/102 passing both times (a handful of pre-existing warnings about small P values on the constant-subsequence tests, unrelated to this change).

To Do List

Standing checklist from @seanlaw for this migration, applies to every file in the split - status below is for test_aamped.py:

• Each test file correctly replaces all uses of npt.assert_almost_equal with its equivalent npt.assert_allclose
• When rtol=0 for npt.assert_allclose, simply omit this parameter and value since this is the default
• Ensure that npt.assert_allclose(actual, desired) always has the stumpy computed value as actual and the naive computation as desired
• Use atol=1.5e-07 rather than atol=1.5*10**-07 - applies to the 27 sites using the implicit default; the other 2 reference config.STUMPY_TEST_PRECISION directly since that's a genuinely different tolerance
• Eventually, replace the ugly 1.5*10**-config.STUMPY_TEST_PRECISION with config.STUMPY_TEST_PRECISION = 1.5e-07 (in config.py) - tracked as a follow-up, not part of this per-file migration
• Use cmp instead of comp - this file used comp_mp throughout, all renamed
• Rename naive outputs to ref_ and stumpy-computed outputs to cmp_ (applies to npt.assert_array_equal too) - this file already used ref_, no assert_array_equal calls present

Pull Request Checklist

Below is a simple checklist but please do not hesitate to ask for assistance!

• Read our Contributing Guide
• Referenced a Github issue (or create one if one doesn't already exist)
• Read and reviewed all of the comments in the Github issue that you've referenced (along with cross-referenced issues/pull requests) to ensure that the issue still requires a pull request
• Checked that the issue has not already been assigned to anybody else or is already being addressed in another pull request
• Left a meaningful comment on the original Github issue to discuss the detailed approach for your contribution and received confirmation from the maintainers before proceeding with this pull request
• Forked, cloned, and checked out the newest version of the code
• Created a new branch
• Made necessary code changes
• Installed black (i.e., python -m pip install black or conda install -c conda-forge black)
• Installed flake8 (i.e., python -m pip install flake8 or conda install -c conda-forge flake8)
• Installed pytest-cov (i.e., python -m pip install pytest-cov or conda install -c conda-forge pytest-cov)
• Ran black --exclude=".*\.ipynb" --extend-exclude=".venv" --diff ./ in the root stumpy directory
• Ran flake8 --extend-exclude=.venv ./ in the root stumpy directory
• Ran ./setup.sh dev && ./test.sh in the root stumpy directory and ensured that all tests are passing locally
• Check this box if AI code assistance was used to generate 15%+ of the code in this pull request

Please do not commit any code to avoid/circumvent a failing test and, instead, engage in a discussion (below) to determine the best course of action.

Only request a review after the checklist above is fully completed!

[gitnotebooks]

Review these changes at https://app.gitnotebooks.com/stumpy-dev/stumpy/pull/1186

[viknesh-ai]

@seanlaw next file in the split — same conventions as the previous PRs. Ready for review whenever you have time.