feat: add Pocket Atlas development gate

feat: freeze independent GtoPdb external holdout

feat: add source-aware multi-task transfer gate

feat: add leakage-safe Chimera development gate

docs: record joint fine-tuning rejection gate

docs: record BALM auxiliary-data negative transfer gate

feat: add source-aware exact-Kd model evaluation with honest no-publish verdict

feat: add source-aware BindingDB recovery track

feat: add Kd-only benchmark recovery track

feat: build leakage-aware MitoInteract recovery pipeline