feat(session-explorer): release v0.4.0 - dual-temporal telemetry, quantum trail capsule, 1-click UUID copy, and single-line lifespan pills - #20

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/