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c49c7bdf97
Implement a full working version of local version semantics. The (AFAIA) major move towards this was implemented in #2430. This added support such that the version specifier `torch==2.1.0+cpu` would install `torch@2.1.0+cpu` and consider `torch@2.1.0+cpu` a valid way to satisfy the requirement `torch==2.1.0` in further dependency resolution. In this feature, we more fully support local version semantics. Namely, we now allow `torch==2.1.0` to install `torch@2.1.0+cpu` regardless of whether `torch@2.1.0` (no local tag) actually exists. We do this by adding an internal-only `Max` value to local versions that compare greater to all other local versions. Then we can translate `torch==2.1.0` into bounds: greater than 2.1.0 with no local tag and less than 2.1.0 with the `Max` local tag. Depends on https://github.com/astral-sh/packse/pull/227.