Fased Agent v0.1.75-rc.1

What's Changed

• Make Hosting root updater self-updating by @fcode-ai in #179
• Fix deterministic Hosting candidate validation by @fcode-ai in #180
• Fix isolated prerelease Hosting acceptance by @fcode-ai in #181
• Prepare v0.1.75-rc.1 release candidate by @fcode-ai in #182

Full Changelog: v0.1.74...v0.1.75-rc.1