chore(deps): upgraded Go version to 1.26.3 and updated all dependencies

[rios0rios0]

Summary

This PR upgrades the Go version to 1.26.3 and updates all module dependencies.

Changes

• Updated go.mod Go directive to 1.26.3
• Ran go get -u -t ./... to update all dependencies
• Ran go mod tidy to clean up

Review Checklist

• Verify build passes
• Verify tests pass
• Review dependency changes in go.sum

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This PR was automatically created by autoupdate

[Copilot]

Pull request overview

This PR updates the module’s declared Go toolchain version and records the change in the changelog, aligning the repository with a Go 1.26.3 baseline.

Changes:

• Bumped the go directive in go.mod from 1.26.2 to 1.26.3.
• Added an [Unreleased] changelog entry noting the version bump (and dependency updates claim).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
go.mod	Updates the module’s Go toolchain version directive to 1.26.3.
CHANGELOG.md	Records the version bump under [Unreleased].

[claude]

Code review: 1 issue found. Checked for bugs and CLAUDE.md compliance.

Documentation not updated to match Go version bump — The Go version is bumped to 1.26.3 in go.mod, but documentation files still reference 1.26.2:

• CLAUDE.md line 7 (

  testkit/CLAUDE.md

  Line 7 in 7dff877

  Go testing utility library (`github.com/rios0rios0/testkit`). Provides a modular builder framework for test environment setup. Pure library -- no deployable artifacts. Requires Go 1.26.2+.

  ) says Requires Go 1.26.2+ — should be updated to Requires Go 1.26.3+
• .github/copilot-instructions.md line 10 (

  testkit/.github/copilot-instructions.md

  Line 10 in 7dff877

  - Ensure Go 1.26.2+ is installed

  ) says Ensure Go 1.26.2+ is installed
• .github/copilot-instructions.md line 154 (

  testkit/.github/copilot-instructions.md

  Lines 153 to 155 in 7dff877

  	go 1.26.2
  	```

  ) shows go 1.26.2 in the example go.mod

Reason: CLAUDE.md compliance — the project documentation now contains a stale minimum Go version. The v0.2.0 release established the pattern of updating these files alongside Go version bumps.

[sonarqubecloud]

Quality Gate failed

Failed conditions
C Security Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

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[rios0rios0]

Addressed in 0069726 (commit from the previous review pass):

• ✅ CLAUDE.md line 7 — updated to Requires Go 1.26.3+
• ✅ .github/copilot-instructions.md line 10 — updated to Ensure Go 1.26.3+ is installed
• ✅ .github/copilot-instructions.md line 154 — updated example go.mod to go 1.26.3

All three documentation files now match go.mod. Verified with grep -n '1.26' CLAUDE.md .github/copilot-instructions.md.

[rios0rios0]

Thanks for the overview, @copilot-pull-request-reviewer. The two inline review comments generated alongside this summary were addressed in 0069726 (CHANGELOG [Unreleased] wording was tightened to drop the inaccurate "module dependencies" claim, since go.mod has no require directives). The summary itself contains no further actionable items.