Release 2.0.1 and refresh discovery metadata

[Maksim-Burtsev]

What changed

• bump the package and exact Docker example to 2.0.1
• refresh the PyPI summary, search keywords, project links, and standalone CLI installation guidance
• add a 1280×640 social preview asset matching the documentation design
• document all changes shipped since 2.0.0

Why

The published PyPI metadata predates the hosted documentation and typed-package marker, while the GitHub repository still uses a generic discovery description and default social card. This patch prepares a consistent 2.0.1 release without changing CLI or migration behavior.

Validation

• uv lock --check
• make lint
• make docs
• uv build
• uv run --with twine twine check dist/*
• installed the built wheel and verified migrator --version reports 2.0.1
• 129 local tests passed; ClickHouse-backed tests require the CI service because the local Docker daemon is unavailable