Phase 6 — Ship (1.0.x)

Phase 6 — Ship. Freezes the public API and finalizes packaging for the 1.0 release.

• M16: strong-name the assemblies; freeze the public surface with public-API baselines; reproducible builds (SourceLink + deterministic); complete package metadata and CHANGELOG; DocFX docs site published to GitHub Pages; gated nuget.org release workflow. Ships 1.0.0-rc.1 for review ahead of the 1.0.0 GA promotion.