Add Linux E2E tests and improve release notes

[jancurn]

Summary

This PR adds comprehensive end-to-end testing for Linux environments and enhances release documentation by including installation instructions on GitHub release pages.

Key Changes

• New Linux E2E workflow (e2e-linux.yml):

  • Tests on Node.js 24 with parallel execution (6 workers)
  • Tests on Bun runtime with parallel execution (4 workers)
  • Runs without gnome-keyring to test encrypted file storage fallback
  • Integrated into the release workflow to ensure Linux compatibility before publishing

• Enhanced release workflow:

  • Added e2e-linux job as a required dependency for releases
  • Updated release condition to require successful Linux E2E execution
  • Added installation instructions to both pre-release and stable release GitHub release pages
  • Instructions include both npm and Bun installation methods
  • Output package name to job outputs for reuse in release body

• Improved release documentation:

  • Install instructions now appear on the release page itself (via append_body)
  • Instructions printed to both job logs and run summary for visibility during execution
  • Used tee to output to both stdout and GitHub summary simultaneously

Implementation Details

• Linux E2E tests run in parallel to reduce CI time while maintaining coverage
• Pre-release and stable release flows both include installation instructions
• Package name is captured as a job output to avoid hardcoding in release body templates
• Release condition uses always() with explicit result checks to handle optional Windows E2E while requiring Linux E2E

https://claude.ai/code/session_01KHm3opxBjDudVG9jr5sSTq