Don't apply irrelevant constraints when validating site-packages #5231
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Summary
The current code was checking every constraint against every requirement, regardless of whether they were applicable. In general, this isn't a big deal, because this method is only used as a fast-path to skip resolution -- so we just had way more false-negatives than we should've when constraints were applied. But it's clearly wrong :)
Test Plan
uv venv
uv pip install flask
uv pip install --verbose flask -c constraints.txt
(withnumpy<1.0
)Prior to this change, Flask was reported as not satisfied.