Update module mvdan.cc/gofumpt to v0.9.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
mvdan.cc/gofumpt	v0.8.0 -> v0.9.0

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Warning

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Release Notes

mvdan/gofumpt (mvdan.cc/gofumpt)

v0.9.0

Compare Source

This release is based on Go 1.25's gofmt, and requires Go 1.24 or later.

A new rule is introduced to "clothe" naked returns for the sake of clarity.
While there is nothing wrong with naming results in function signatures,
using lone return statements can be confusing to the reader.

Go 1.25's ignore directives in go.mod files are now obeyed;
any directories within the module matching any of the patterns
are now omitted when walking directories, such as with gofumpt -w ..

Module information is now loaded via Go's x/mod/modfile package
rather than executing go mod edit -json, which is way faster.
This should result in moderate speed-ups when formatting many directories.

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Configuration

📅 Schedule: Branch creation - "on tuesday" (UTC), 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: internal/tools/go.sum

Command failed: go get -t ./...
go: downloading go1.25.0 (linux/amd64)
go: download go1.25.0: golang.org/[email protected]: verifying module: checksum database disabled by GOSUMDB=off

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.40%. Comparing base (15e0990) to head (32be75c).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #13753   +/-   ##
=======================================
  Coverage   91.39%   91.40%           
=======================================
  Files         641      641           
  Lines       42611    42611           
=======================================
+ Hits        38943    38947    +4     
+ Misses       2845     2842    -3     
+ Partials      823      822    -1     

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