Update Omarchy to 4.0.2

[themartiano]

Summary

• pin the official Omarchy v4.0.2 commit, tree, normalized source digest, and timestamp
• refresh the complete ARM64 package lock and v4.0.2 notification backport hashes
• preserve staged package-path symlinks while applying and verifying reviewed backports, incorporating the applicable fix from Update package versions and 1password symlink issue regression #70
• update the contributor example and add symlink regression coverage