Custom-node routing

Load facts only when the task needs them. Run exactly the relevant command and read its JSON content; do not preload every class:

comfy --json knowledge authoring invocation
comfy --json knowledge authoring ecosystem-reference
comfy --json knowledge authoring api-schema
comfy --json knowledge authoring validation
comfy --json knowledge authoring dependencies-capabilities
comfy --json knowledge authoring troubleshooting
comfy --json knowledge authoring packaging-publishing
comfy --json knowledge authoring frontend-extension
comfy --json knowledge authoring v1-to-v3-migration
comfy --json knowledge authoring execution-caching