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docs(unity, native, unreal): Fix app hang docs - #20339
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Mark app hang tracking as experimental, list the detector per platform, and explain the sentry-native heartbeat: the first frame is excused, detection pauses in the background or out of focus (getsentry/sentry-unity#2895), and timeouts below 2 seconds report frame hitches. Point readers to enable the deprecated watchdog only through the editor, add its MainThreadWatchdog query, and redirect the removed app-not-responding page to app hangs.
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sentry-native: document sentry_app_hang_pause(), that detection starts with the first heartbeat and reports each freeze once, the event shape, the 1 s minimum on the options page, and the stack capture limits. Fix the Android NDK requirement to 8.49.0 and add pause (8.52.0). Unreal: list the engine watcher's conditions (no Editor, Debug builds, or debugger), that it reports any heartbeat thread, the native watchdog's per-frame heartbeat with pause on Android only, its Editor behavior, settings labels and event names; remove version history. Unity: drop the console mention.
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DESCRIBE YOUR PR
Fixes the app hang docs for Unity, sentry-native, and Unreal against the SDKs' current code. Consoles and Godot aren't covered here.
Unity
AppHangTimeoutshould stay at 2 seconds or more.MainThreadWatchdogquery./platforms/unity/configuration/app-not-responding/to the app hangs page, and remove its orphaned image.sentry-native
sentry_app_hang_pause()(0.16.1), and that only the watched thread may send heartbeats.sentry_close(), each freeze is reported once, and events arrive up to 500 ms after the timeout.AppHangexception and mechanism) and limits (no event without a stack trace,SIGRTMIN+4on Linux and Android, Windows validated on x64).Unreal
-nothreadtimeout. KeepHangDurationaboveHangTimeoutDuration.CrashType:Hangtag.Should be merged together with the sentry-unity 4.12.0 release.
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