0.13.0

What's Changed

• Add cross-platform parity spec, acceptance tests, and substrate generators by @bnfy in #13
• Document parity infrastructure in CLAUDE.md; guard settings:check against unguarded keys by @bnfy in #14
• Harden ping worker against transient KV failures; enable Workers Logs by @bnfy in #8
• Add active-user metrics to the launch ping by @bnfy in #15

Full Changelog: v0.12.0...v0.13.0