v0.4.0

What's Changed

• feat(server): postgres schema and data layer by @mbroton in #102
• feat(server): control plane API by @mbroton in #103
• feat(server): scheduler and rescuer by @mbroton in #105
• feat(server): session-record relay by @mbroton in #106
• feat(worker): control-plane client and lifecycle fixes by @mbroton in #107
• feat: cut over to the control-plane server by @mbroton in #108
• fix(ci): move shared dependabot options to the multi-ecosystem group by @mbroton in #109
• feat(bench): add reproducible latency and throughput benchmarks by @mbroton in #110
• docs(bench): write methodology notes for the reader, not the author by @mbroton in #111
• docs: rewrite README, add comparison benchmark and worker tuning guide by @mbroton in #112
• fix(worker): recycle the browser in place instead of exiting by @mbroton in #113

Full Changelog: v0.3.0...v0.4.0