- Merge baked base_url/owner/repo/release_tag at load time (no inject script,
no fractured-release-channel.json, no CI env for pack).
- Fix mergeConfig deep-merge for gitea, patch_manifest, launcher_updates_from_github.
- Remove inject-release-channel.js and fractured-release-channel.json.
Co-authored-by: Cursor <cursoragent@cursor.com>