Gate Yield releases on complete package history

[bigboateng]

Summary

• keep GitHub releases draft until all package journeys pass
• verify complete TypeScript, Python, Go, and Rust history before promotion
• test current and previous exact versions on every supported target
• publish a machine-readable package receipt for the website

Test plan

• packaging tests in verify and release workflows
• six native install-journey jobs
• current and previous exact package versions
• release receipt required before publication