add egg v4

[fengmk2]

Summary by CodeRabbit

• Infrastructure Updates

  • CI test matrix now includes Node.js 25.

• New Features

  • Added support for an additional runtime and a Koa v2 startup path with configurable runtime flags (framework, port, workers, reusePort, startMode).
  • New profiling analysis tooling and an aggregated CPU profile report with optimization recommendations.

• Tests

  • Expanded local test orchestration to exercise multiple runtimes and improved per-service logging and cleanup.

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