Bump py-key-value-aio to >=0.4.0,<0.5.0

[strawgate]

Upgrades py-key-value-aio from 0.3.0 to 0.4.0, taking advantage of improved type annotations in PydanticAdapter.

The v0.4.0 release fixes type signature issues with generic aliases, allowing us to remove 6 type: ignore[arg-type] comments from the caching middleware. All tests pass and no breaking changes were encountered.

Closes #3052

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Generated with Claude Code

[coderabbitai]

Walkthrough

This pull request updates documentation references in the FastMCP server middleware caching documentation to reflect new line numbers in the source file. Concurrently, in-code comments indicating expected typing fixes for PydanticAdapter generic aliases have been removed from the caching middleware implementation, along with associated type: ignore annotations on pydantic_model arguments. These changes reflect cleanup following the upgrade of the py-key-value-aio dependency, with no modifications to caching logic or public APIs.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title directly describes the main change: bumping the py-key-value-aio dependency version, which is the primary purpose of this PR.
Description check	✅ Passed	The description covers the upgrade details, rationale for improved type annotations, removal of type ignore comments, test status, and closes the linked issue. The contributors and review checklists are appropriately marked.
Linked Issues check	✅ Passed	The PR meets the requirements of issue #3052: upgrades py-key-value-aio to >=0.4.0,<0.5.0, takes advantage of improved type annotations, removes type ignore comments, confirms no breaking changes, and all tests pass.
Out of Scope Changes check	✅ Passed	All changes are directly related to the dependency upgrade and its implications: documentation reference updates and removal of type ignore comments that are no longer needed due to the upgraded dependency.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch claude/issue-3052-20260210-2313

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[jlowin]

Nice!