feat(probes): enrich lifecycle capture

[vincentkoc]

What

• retain registrar return values when handler retention is enabled
• add registrar-specific synthetic invocation inputs for tools, commands, routes, gateway methods, lifecycle hooks, interactive handlers, and speech providers
• preserve retained capture metadata from mock-SDK subprocess capture
• classify entrypoint import and registration execution failures in runtime capture reports

Why

The inspector needs to behave more like a host when probing captured handlers. One generic event object was too weak for tool/route/command handlers, and runtime failures needed to say whether import or registration actually failed.

Impact

• richer synthetic probes for retained local captures
• mock-SDK subprocess captures expose retained metadata, while callable JS functions remain intentionally blocked after JSON serialization
• runtime report JSON gets clearer failureClass values for import and register failures

Checks

• node --test test/capture-api.test.js test/synthetic-probes.test.js test/runtime-capture-report.test.js
• npm run release:local