v0.3.0

Added

• Starter prod environment now defaults to MotherDuck: .dlt/prod.secrets.toml template, motherduck extra in pyproject.toml, and a "paste your MotherDuck token" step in the next-steps panel.
• Bundled toolkits expanded with data-quality, dlthub-platform, filesystem-pipeline, and sql-database-pipeline; regenerated AI workbench files reflect the new set.
• CONTRIBUTING.md notes the git add -f workaround for scaffold templates that match the shipped .gitignore.

Changed

• Bumped WORKBENCH_REF to 42ddb99 and refreshed the bundled AI workbench scaffold.
• starter_transformations.py now reads upstream data via dlt.attach(...) instead of importing starter_pipe, avoiding pipeline re-instantiation as an import side effect.

Removed

• .dlt/access.config.toml from the starter scaffold (notebooks share the prod env).
• Dead [destination.warehouse] block in .dlt/config.toml (per-env configs set their own destination).