Python SDK 0.3.20a1 and Charts 0.3.2a1

OpenEconometrics SDK 0.3.20a1 and openecon-charts 0.3.2a1, built once from source a805870d971c0d571f6d5dec79e914b91d6479aa.

The attached four distributions are the exact bytes installed and tested on Linux Python 3.11/3.13 and macOS. Acceptance includes isolated wheel/source installs, package examples, complete HC3 covariance and saved-result replay, and 88 sandboxed chart export checks for each charts distribution on each tested platform.

The exact packaged source passed the registered 171-selector scientific gate on both Python minors: 14,667 cases per minor, no failures, errors or skips, and the unchanged 900-second cohort limit. Source, package provenance and bounded acceptance receipts are attached.

This alpha package release does not establish vendor parity, CUDA acceptance, native installer acceptance or cloud-team acceptance. Desktop release evidence is maintained separately. Source and dependencies retain their licenses and notices. Teaching labs remain available in the public repository's teaching directory.