Clarify dataset count hierarchy v0.4.4

Add research and policy use layer v0.4.3

Fix Hugging Face Viewer configs in v0.4.2

Release v0.4.1 public dataset explorer

Fix Hub Viewer conversion fan-out

v0.4.0: harden deterministic build and validation

Publish strict v0.3.1 builders and 26-table validation

Publish v0.3.0 reproducibility scripts

Extend build and audit for official electoral context

Add build, validation, and audit scripts