fix: publish canonical package identity and metadata

[stefan-jansen]

Outcome

• Use Stefan Jansen stefan@applied-ai.com as author.
• Use Stefan Jansen pm@ml4trading.io as maintainer and security contact.
• Improve the package summary, canonicalize the documentation URL, and correct the README ecosystem count.
• Validate wheel and sdist metadata through artifact contract tests.

Compatibility

• No public compatibility impact

Verification

• 410 tests passed
• Coverage policy passed at 95.49% lines and 85.36% branches
• Ruff lint and format checks pass
• ty passes
• Package build passes
• Strict MkDocs build passes
• All pre-commit hooks pass

Documentation and release

PyPI 0.1.2 still exposes the old identity and project metadata. Publish 0.1.3 after merge.

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