chore(deps): update mypy type stubs

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
types-fpdf2 (changelog)	==2.8.4.20260322 → ==2.8.4.20260402
types-python-dateutil (changelog)	==2.9.0.20260323 → ==2.9.0.20260402
types-requests (changelog)	==2.32.4.20260324 → ==2.33.0.20260402

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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 types-fpdf2 --upgrade-package types-python-dateutil --upgrade-package types-requests
Using CPython 3.13.12 interpreter at: /opt/containerbase/tools/python/3.13.12/bin/python3
  × No solution found when resolving dependencies for split (markers:
  │ python_full_version == '3.13.12' and sys_platform == 'win32'):
  ╰─▶ Because there is no version of types-fpdf2==2.8.4.20260402 and admin:dev
      depends on types-fpdf2==2.8.4.20260402, we can conclude that admin:dev's
      requirements are unsatisfiable.
      And because your project requires admin:dev, we can conclude that your
      project's requirements are unsatisfiable.

      hint: The resolution failed for an environment that is not the current
      one, consider limiting the environments with `tool.uv.environments`.