fix: revert buf config after #1078

[pandatix]

Reverts #1078 as it has been fixed a while ago, we should no longer need this.

[github-actions]

The latest Buf updates on your PR. Results from workflow CI / buf-lint (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	Feb 6, 2026, 9:49 AM

[coveralls]

Pull Request Test Coverage Report for Build 21746023818

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 15 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.1%) to 50.118%

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Files with Coverage Reduction	New Missed Lines	%
cmd/chall-manager-janitor/main.go	15	78.38%

Totals
Change from base Build 21722776768:	-0.1%
Covered Lines:	4470
Relevant Lines:	8919

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💛 - Coveralls