v0.5.0

What's Changed

• ci(embed-cdn): switch preview-channel deploy to WIF + firebase CLI by @GaryRudolph in #50
• feat(embed): /latest/ CDN path, version history, and milestone closeout by @GaryRudolph in #51
• docs(releasing): fix pre-flight binary name to platform-suffixed form by @GaryRudolph in #49
• fix(ci): push editor release history via release App token by @GaryRudolph in #53
• fix(embed): say @nowline.io on dev gate sign-in interstitial by @GaryRudolph in #54
• docs(specs): add m4.8 MCP milestone and distribution docs by @GaryRudolph in #55

Full Changelog: v0.4.2...v0.5.0