fix: support SetNativeDescription on iOS, macOS, and Android via attribute promotion

[bobbyg603]

Closes #139. Replaces #146, which cannot be merged — see below.

Why this PR exists

#146 was branched off feat/windows-native-crash-reporting while #123 was still open. #123 was squash-merged, so main now holds all of that work as a single commit (f6adbf4) with no shared history with #146's branch. The merge base between #146 and main is therefore a commit from before #123 landed, and #146's diff against main shows 57 files — all of #123 replayed, plus its own change.

That is not merely cosmetic. A test merge of #146 into main fails:

CONFLICT (rename/rename): Samples~/my-unity-crasher/Scripts/ErrorGenerator.cs.meta renamed to
Editor/WerRegistration.cs.meta in HEAD and to
Samples~/my-unity-crasher/Scripts/CrashScenarios.cs.meta in origin/fix/native-description-all-platforms

and the content conflicts would revert #126's sample work — #146's branch predates it, so its copy of CrashScenarios.cs still carries the old KNOWN GAP: appears in Player.log but produces no report text and would overwrite what is now on main.

This branch is the same commit (1509206) cherry-picked onto main, so the diff is only the change itself.

What it does

SetNativeDescription was Windows-only (BugSplat_SetUserDescription); on iOS, macOS, and Android it fell through to the nativeCrashReportingEnabled guard and did nothing, so bugsplat.Description = ... never reached native crash reports on those platforms.

It now sets the reserved attribute BugSplatDescription through the same per-platform interop the sibling setters already use — _setNativeAttributeIos / _setNativeAttributeMac on Apple, BugSplatBridge.setAttribute on Android. The backend promotes that attribute into the report's description field. Windows is unchanged.

Note

Backend dependency. The promotion ships in BugSplat-Git/src-backend#617 (fixes BugSplat-Git/src-backend#616). Until that deploys, the value still arrives with the crash report — it just shows as a plain visible attribute named BugSplatDescription instead of populating the description field. Harmless, and not silent data loss; once the backend deploys, promotion applies with no client change. Merge order does not matter; deploy order does.

Verification

dotnet build of Runtime/** + Tests/Runtime/** against Unity 6000.5.6f1 assemblies, compiled once per platform define so every branch of the touched #if chain was actually built: UNITY_IOS, UNITY_STANDALONE_OSX, UNITY_ANDROID, UNITY_STANDALONE_WIN — 0 errors each, plus the no-defines editor case.

Not verified: no Unity run, and no crash reported from a real device on any of the three newly-wired platforms. That is deferred to the release smoke test (#200), which covers Description on iOS, macOS, and Android.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR extends BugSplat.SetNativeDescription so that description values reach native crash reports on iOS, macOS, and Android by setting the reserved BugSplatDescription attribute via existing per-platform interop (Windows behavior remains unchanged).

Changes:

• Updated SetNativeDescription to call _setNativeAttributeIos/_setNativeAttributeMac with BugSplatDescription on Apple platforms.
• Updated SetNativeDescription to call BugSplatBridge.setAttribute("BugSplatDescription", ...) on Android.
• Updated the XML doc comment to remove the “Windows only” claim.

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