docs: update CI go version reference to 1.25

[facundofarias]

Summary

• CLAUDE.md said `Go 1.23 + 1.24` for CI but `.github/workflows/ci.yml` matrix is now `["1.25"]`.

Test plan

• No code changes; docs-only

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Updated CI documentation to reflect current Go toolchain versions.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 11c173b and cd83190.

📒 Files selected for processing (1)

• CLAUDE.md

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Walkthrough

CLAUDE.md is updated to document the current Go toolchain version used in CI as Go 1.25, replacing the prior notation of Go 1.23 + 1.24.

Changes

CI Documentation Update

Layer / File(s)	Summary
CI Toolchain Documentation CLAUDE.md	Documented Go version for CI workflow updated from "Go 1.23 + 1.24" to "Go 1.25".

🎯 1 (Trivial) | ⏱️ ~1 minute

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/ci-go-version

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