1.0 release checklist

[pesap]

Description

Final checklist for 1.0 release:

• All issues in 0.5-0.9 closed
• Full test coverage >90%
• Documentation complete (spec, tutorials, API docs)
• Security audit (cargo-audit, supply chain review)
• Release notes with migration guide from 0.4
• Announcement blog post drafted
• PyPI package published
• Binary releases for all platforms

Context

Part of v1.0 (Stable). The finish line.

Target: v1.0