ci: stop piping the iOS xcodebuild through xcbeautify

Follows #391, which dropped xcbeautify from the macOS job and noted it was
the only use of it in the repo. This branch forked before that landed, so
rebasing brought it back for iOS — it should go the same way.

Its stated failure mode showed up here too. Diagnosing the Release build on
this branch, "** ARCHIVE FAILED **" and the failed-command list printed
~150 lines *before* the compiler errors that explained them, because
xcbeautify's stdout is block-buffered through the pipe. The summary read as
the whole story and pointed at the wrong cause.

Raw xcodebuild output is verbose but complete and correctly ordered. It
also makes the pipefail guard added earlier on this branch unnecessary: the
step's exit code is now xcodebuild's own, so `shell: bash` goes too.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UxzZtpa5Nz3F8ACXzX7Hww

Author: claude

.github/workflows/check.yml

@@ -250,13 +250,17 @@ jobs:
           echo "::error::pod install kept failing with CocoaPods/CocoaPods#12866"
           exit 1
       - name: Build test app
-        # `shell: bash` for pipefail, so xcbeautify's exit code can't mask a
-        # failing xcodebuild. A bare `run:` uses `bash -e` without pipefail.
-        shell: bash
+        # Not piped through xcbeautify, for the reasons #391 gave when dropping
+        # it from the macOS job: on a failure it prints the summary but not the
+        # failing phase's own output, and block-buffers what it does print, so
+        # the log arrives truncated and out of order. Raw xcodebuild output is
+        # verbose but complete and correctly ordered, and the step's exit code
+        # is xcodebuild's own, so no `set -o pipefail` guard is needed.
+        #
         # C_COMPILER_LAUNCHER keeps Xcode's own clang and merely prefixes it
         # with ccache, so the compiler still matches the SDK. Explicit modules
         # needs opting in for a launcher, hence the second setting.
-        run: xcodebuild archive -workspace ReactTestApp.xcworkspace -configuration Release -scheme ReactTestApp -destination "generic/platform=iOS Simulator" -archivePath ./build/test-app.xcarchive CODE_SIGN_IDENTITY="-" CODE_SIGNING_ALLOWED=YES C_COMPILER_LAUNCHER=ccache CLANG_ENABLE_EXPLICIT_MODULES_WITH_COMPILER_LAUNCHER=YES | xcbeautify
+        run: xcodebuild archive -workspace ReactTestApp.xcworkspace -configuration Release -scheme ReactTestApp -destination "generic/platform=iOS Simulator" -archivePath ./build/test-app.xcarchive CODE_SIGN_IDENTITY="-" CODE_SIGNING_ALLOWED=YES C_COMPILER_LAUNCHER=ccache CLANG_ENABLE_EXPLICIT_MODULES_WITH_COMPILER_LAUNCHER=YES
         working-directory: apps/test-app/ios
       - name: Run test app
         run: |