[xservzeroman]

Opt-in anonymous usage check-in for daily / monthly active users, and Obtainium + Privacy in the README.

Changelog

• home/Usage.kt: posts one MoonCast.dailyCheckIn signal a day to TelemetryDeck's ingest API v2 (nom.telemetrydeck.com/v2/, plain HttpURLConnection, no SDK) when the user said yes.
  • Payload: app version, tv / handheld, Android version, manufacturer + model, and MoonCast.used.pc/ps5/xbox since the last check-in.
  • clientUser = SHA-256 of a random install UUID kept in the app's prefs. No names, addresses, games, accounts.
  • Debug builds send with isTestMode. Failures are logged and retried another day.
• Only builds with TELEMETRY_APP_ID (from -PmcTelemetryAppId or env MOONCAST_TELEMETRY_APP_ID, app/build.gradle) ask or send. Forks, CI's plain builds and test builds don't.
• Handheld + TV home: the question once, 1.5 s after the home opens, with No thanks selected; Settings, About switch afterwards. TV confirm() gains no, noPicked, onNo.
• Game, Ps5StreamActivity, XboxStreamActivity: Usage.used(...) on start (only stored when opted in).
• README: install section for the beta file names, Obtainium one-tap links (prereleases on, titles ^MoonCast [0-9.]+( |$), APK filter per app), Privacy section.
• Build: test246 (no app ID, so the check-in is off). Lint: 0 errors. Stacked on fix: quit prompts pick Cancel, Recent only on a real start; remove On battery #96.

To test (once there's an app ID)

• Build with -PmcTelemetryAppId=<id>: the question appears once; No thanks never sends; Yes sends one signal (log usage check-in sent), and not again that day; the switch in About turns it off.
• Obtainium: open the README link on a phone with Obtainium; it should add MoonCast and offer 1.0-beta2, not the test builds.

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