Select llama.cpp GGUF on CPU Basic Spaces

Add field guide and few-shot examples to extraction prompt.

Default extraction to the fine-tuned MiniCPM-V Hub checkpoint.

Remove dead chat code and obsolete planning docs.

Expand lab knowledge graph to 107 markers with curated YouTube videos.

Lock trace steps until extraction completes and simplify step headers.

Polish trace steps and add marker video embeds to reports.

Make agent pipeline steps easier to understand in plain language.

Polish section 3 trace panel and Space startup reliability.

Add agent trace panel, vision extraction, and local Transformers backend.

Fix llama.cpp JSON extraction path

Add knowledge graph health report pipeline

feat(extraction): offline llama-server backend + tolerant JSON parsing

feat(eval): field-level extraction eval harness + tests