Pin decorator to avoid license metadata regression

[L0rdCha0s]

Proposed change

Pin decorator to 5.2.1 in homeassistant/package_constraints.txt and in the CONSTRAINT_BASE source used by script/gen_requirements_all.py.

decorator==5.3.0 is BSD-2-Clause licensed and still ships LICENSE.txt, but the 5.3.0 wheel no longer exposes the machine-readable license metadata checked by script/licenses.py (License, License-Expression, or license classifiers). This makes the license audit report it as None -- None -- [].

decorator==5.2.1 still exposes the BSD license metadata, so pinning to 5.2.1 avoids the license audit regression without adding a license exception. This constraint can be removed once upstream restores license metadata in a newer release.

Validation performed:

• ruff check script/gen_requirements_all.py
• ruff format --check script/gen_requirements_all.py
• python -m script.gen_requirements_all validate
• git diff --check
• verified uv pip compile -c homeassistant/package_constraints.txt requirements.txt requirements_all.txt requirements_test.txt --python-version 3.14 resolves decorator==5.2.1

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: n/a
• This PR is related to issue: n/a
• Link to documentation pull request: n/a
• Link to developer documentation pull request: n/a
• Link to frontend pull request: n/a

Checklist

• I understand the code I am submitting and can explain how it works.
• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• I have followed the perfect PR recommendations
• The code has been formatted using Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.
• Any generated code has been carefully reviewed for correctness and compliance with project standards.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• For the updated dependencies a diff between library versions and ideally a link to the changelog/release notes is added to the PR description.

To help with the load of incoming pull requests:

• I have reviewed two other open pull requests in this repository.

[L0rdCha0s]

This has been raised upstream in decorator by lackas: micheles/decorator#185, so this PR can be closed if the decorator maintainer fixes it first.