Two ComfyUI issues found while testing.
1. Empty output with no error: the Knowledge Base Loader resolved a relative
`path` against ComfyUI's working directory, not this package, so the default
`knowledge_base/` loaded 0 entries (an empty KB is valid) and every concept
became unknown -> empty prompts. Relative paths now resolve against the
package root, and the loader warns when the Knowledge Base is empty.
2. Add a `raw` string output (a JSON dump of the node's data) to the Scene
Analyzer, Scene Validator, Resolver, Category Splitter, and Prompt Builder
nodes, plus a summary `raw` on the Knowledge Base Loader, for inspecting the
pipeline in the graph. Adds a shared to_raw_json helper.
Tests: package-relative path resolution (independent of cwd), empty-KB warning,
raw output content, and updated node metadata/return-arity expectations.
Co-authored-by: kunail0804 <kunail0804@gmail.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
