chore(deps): update actions/setup-node action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/setup-node	action	major	v4 → v6

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Release Notes

actions/setup-node (actions/setup-node)

v6

Compare Source

v5

Compare Source

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Configuration

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Greptile Overview

Greptile Summary

This PR updates the actions/setup-node GitHub Action from v4 to v6 across four workflow files. This is a standard dependency maintenance update generated by Renovate bot.

Workflows Updated:

• ci.yml: Runs tests against Node.js versions 16, 18, 20, and 22 using a matrix strategy
• coana-guardrail.yml: Security analysis workflow using Node.js 20.x
• fix-latest.yml: NPM tag management workflow using Node.js 18
• release.yml: Package publishing workflow using Node.js 24 (required for npm 11+ and Trusted Publishers feature)

Analysis:
All workflows use standard configuration patterns with only the node-version parameter specified. The update spans two major versions (v4 → v6), but the changes are backwards-compatible with the existing configurations:

• No cache configuration is used in any workflow, eliminating cache-related breaking changes
• Node version specifications remain compatible (plain numbers, .x suffix, and matrix variables are all supported)
• Registry URL configurations in fix-latest.yml and release.yml remain unchanged and compatible
• The use of Node.js 24 in release.yml was intentionally set in a previous commit to support npm Trusted Publishers

No breaking changes or compatibility issues were identified in this update.

Confidence Score: 5/5

• This PR is safe to merge with minimal risk - it's a standard dependency update with no breaking changes
• Score of 5 reflects that this is a straightforward dependency update with no configuration changes, no breaking changes affecting the existing setup, and all workflows use standard patterns that remain compatible with actions/setup-node v6. The node versions being used (16, 18, 20, 22, 24) are all well-established and supported.
• No files require special attention - all changes are identical version bumps

Important Files Changed

File Analysis

Filename	Score	Overview
.github/workflows/ci.yml	5/5	Updates actions/setup-node from v4 to v6 for CI workflow testing Node.js versions 16, 18, 20, and 22. Standard configuration with no breaking changes expected.
.github/workflows/coana-guardrail.yml	5/5	Updates actions/setup-node from v4 to v6 for Coana security guardrail workflow using Node.js 20.x. No compatibility issues identified.
.github/workflows/fix-latest.yml	5/5	Updates actions/setup-node from v4 to v6 for NPM latest tag management workflow using Node.js 18. Registry URL configuration remains compatible.
.github/workflows/release.yml	5/5	Updates actions/setup-node from v4 to v6 for release workflow using Node.js 24 (required for npm 11+ and Trusted Publishers). No breaking changes expected.

Sequence Diagram

sequenceDiagram
    participant Renovate as Renovate Bot
    participant Workflows as GitHub Workflows
    participant SetupNode as actions/setup-node
    participant Node as Node.js Runtime

    Note over Renovate,Node: Dependency Update: actions/setup-node v4 → v6

    Renovate->>Workflows: Update 4 workflow files
    Note over Workflows: ci.yml (Node 16,18,20,22)<br/>coana-guardrail.yml (Node 20.x)<br/>fix-latest.yml (Node 18)<br/>release.yml (Node 24)

    rect rgb(240, 248, 255)
        Note over Workflows,Node: CI Workflow Execution
        Workflows->>SetupNode: Setup Node (matrix: 16,18,20,22)
        SetupNode->>Node: Install & configure Node versions
        Node-->>Workflows: Ready for testing
        Workflows->>Workflows: Run tests, lint, build
    end

    rect rgb(255, 248, 240)
        Note over Workflows,Node: Release Workflow Execution
        Workflows->>SetupNode: Setup Node 24
        SetupNode->>Node: Install Node 24 (npm 11+)
        Node-->>Workflows: Ready with Trusted Publishers support
        Workflows->>Workflows: Run tests
        Workflows->>Workflows: Publish to NPM with provenance
    end

    Note over Renovate,Node: ✓ No breaking changes<br/>✓ All configurations compatible<br/>✓ Safe to merge

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