feat(loveless): integrate biodata-registry 0.1.8 sc datasets (Path P by modality)

feat(loveless): ADR-0006 #6 — h5ad source type + Path P loading plan

fix(loader): authenticate h5ad loads in dataset metadata tools

feat(concordance): same-cohort normalization concordance routine (decoupler_normalization_concordance)

feat: hide microarray from advertised inventory + plain-language Approach in solutions

ADR-0001 Phase 1, step 3 (T4): dataset_get_integration_plan wrapper + 0.1.2 re-pin

Split dataset_tools.py (1709) into a package preserving the public API