Variant D: parts-aware costing (YOLOv8-seg damage ∩ parts → catalog)

Bump RELEASE_TAG to v0.2.0 + cache-bust on tag change

checkpoint-5: add `src/` to sys.path in app.py so HF can import ccdp

checkpoint-4: fix HF deploy + wire XGBoost bundles on the Space

checkpoint-3: comparison report, FastAPI, Gradio, HF Space deploy