Update dependency mypy to v1.15.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mypy (changelog)	==1.12.1 -> ==1.15.0

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Release Notes

python/mypy (mypy)

v1.15.0

Compare Source

v1.14.1

Compare Source

v1.14.0

Compare Source

v1.13.0

Compare Source

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: uv.lock

Command failed: uv lock --upgrade-package mypy
Using CPython 3.13.1 interpreter at: /opt/containerbase/tools/python/3.13.1/bin/python3
  × No solution found when resolving dependencies:
  ╰─▶ Because djangorestframework-stubs[compatible-mypy]==3.15.2 depends
      on mypy>=1.12,<1.14 and drf-multi-serializers:development depends on
      djangorestframework-stubs[compatible-mypy]==3.15.2, we can conclude that
      drf-multi-serializers:development depends on mypy>=1.12,<1.14.
      And because drf-multi-serializers:development depends on mypy==1.15.0
      and your project requires drf-multi-serializers:development, we can
      conclude that your project's requirements are unsatisfiable.