Development-signed builds now opt into the Production CloudKit
environment via com.apple.developer.icloud-container-environment,
driven by a CLOUDKIT_ENV build setting. A new Debug-CKDev configuration
and "Yattee (CloudKit Dev)" scheme switch to the Development
environment for schema work.
The DEV badge and banner in iCloud settings now reflect the actual
environment (YatteeCloudKitEnvironment Info.plist key) instead of
#if DEBUG, and the sync engine logs the environment at startup.
Bake https://dl.yattee.stream/appcast.xml into SUFeedURL and align the
appcast template and Sparkle setup notes so the gh-pages branch (served
under the custom Cloudflare-CNAMEd domain) is the single place to look
up the feed. Domain is reserved as a generic distribution surface for
Sparkle today and AltStore / other channels later.
New Release-DeveloperID configuration gates Sparkle behind a SPARKLE
compile flag so the App Store Release build stays Sparkle-free. Adds
SPUStandardUpdaterController wrapper, Check for Updates menu command,
Advanced Settings section with beta channel toggle, and a Ruby script
plus GitHub Actions job that signs each release and publishes the
appcast to gh-pages for consumption by Sparkle and Homebrew cask.
