Upload a ProGuard/R8 mapping file and native debug symbols to Google Play so Play Console de-obfuscates crash stack traces

Documented steps

1. Authenticate with scope https://www.googleapis.com/auth/androidpublisher and Play Console access to the target app.
2. POST .../applications/{packageName}/edits (edits.insert) and capture editId.
3. If the artifact is not yet uploaded, POST the .aab to https://androidpublisher.googleapis.com/upload/androidpublisher/v3/applications/{packageName}/edits/{editId}/bundles and read versionCode from the returned Bundle.
4. Upload the R8/ProGuard mapping.txt to the media-upload path: POST https://androidpublisher.googleapis.com/upload/androidpublisher/v3/applications/{packageName}/edits/{editId}/apks/{apkVersionCode}/deobfuscationFiles/proguard with the file as the request body.
5. Example: curl -X POST -H "Authorization: Bearer $TOKEN" -H "Content-Type: application/octet-stream" --data-binary @mapping.txt "https://androidpublisher.googleapis.com/upload/androidpublisher/v3/applications/$PKG/edits/$EDIT_ID/apks/$VERSION_CODE/deobfuscationFiles/proguard"
6. Upload native debug symbols (the symbols archive produced by AGP) to the same path shape with the nativeCode type: .../apks/{apkVersionCode}/deobfuscationFiles/nativeCode
7. Check DeobfuscationFilesUploadResponse.deobfuscationFile.symbolType in each response to confirm the type Play recorded matches what you sent.
8. Assign the versionCode to a track release with edits.tracks.update if that has not already been done.
9. POST .../edits/{editId}:commit to finalize. Uploading the symbol files alone does nothing until the edit is committed.
10. Verify in Play Console under App bundle explorer or Crashes and ANRs that traces for that versionCode now resolve to source symbols.