DisplayWeave v0.2.1-p6

Android dual-source update transition release.

• Cloudflare downloads.urlget.cyou is the primary APK source.
• GitHub Release remains the automatic fallback for network and availability failures.
• Both downloads use the same size, SHA-256, package, version, SDK, and pinned signing-certificate verification.
• Integrity or identity failures stop immediately and never trigger mirror fallback.

Android p5 must be manually upgraded once from the website. After p6 is installed, later Android updates can use both sources automatically.

See the bilingual release notes in docs/release-notes-v0.2.1-p6.md.