chore: upgrade to Go 1.26

[pitabwire]

Summary

• Upgrade Go version from 1.25.2 to 1.26
• Upgrade pitabwire/util from v0.5.0 to v0.6.0 (also Go 1.26)

Test plan

• go mod tidy passes
• go test ./... passes (all 26 packages)
• CI checks pass

[gemini-code-assist]

Summary of Changes

Hello @pitabwire, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on essential maintenance by upgrading the project's Go language version and a key internal utility dependency. These updates ensure the codebase remains current with the latest Go ecosystem, potentially benefiting from performance improvements, security patches, and new language features, while also maintaining compatibility with updated internal libraries.

Highlights

• Go Version Upgrade: The project's Go version has been upgraded from 1.25.2 to 1.26, ensuring compatibility with the latest language features and improvements.
• Dependency Update: The pitabwire/util module dependency has been updated from v0.5.0 to v0.6.0, aligning with the new Go version and bringing in any changes from that library.

Changelog

• go.mod
  • Updated the Go language version from 1.25.2 to 1.26.
  • Upgraded the github.com/pitabwire/util dependency from v0.5.0 to v0.6.0.
• go.sum
  • Updated checksums for the github.com/pitabwire/util module to reflect the v0.6.0 upgrade.

Activity

• The author has confirmed that go mod tidy passes successfully.
• The author has confirmed that all 26 packages pass go test ./....
• CI checks are pending to validate the changes in an automated environment.

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[gemini-code-assist]

Code Review

This pull request upgrades the Go version to 1.26 and the github.com/pitabwire/util dependency to v0.6.0. The modifications in go.mod and go.sum align with these version changes. My review of these dependency updates did not identify any issues.