engine

Runtime execution engine package for Executor v2.

Current scaffold includes:

• provider contracts (ToolProvider) and canonical tool descriptor model
• provider registry service (ToolProviderRegistryService) with discover/invoke routing
• OpenAPI provider invocation and manifest-to-descriptor conversion helpers
• minimal in-process JavaScript runner with tools.* proxy dispatch into provider registry
• Deno subprocess runner with line-delimited JSON IPC for proxied tools.* calls
• runtime adapter contract + registry (local-inproc, deno-subprocess, cloudflare-worker-loader scaffold)
• vertical integration test covering OpenAPI extraction -> descriptor conversion -> code execution -> HTTP call