Disable parallel testing for xcodebuild tests

Add -parallel-testing-enabled NO to both test and test-ui targets in the Makefile so xcodebuild runs tests serially. This prevents parallel test execution on the iOS simulator (iPhone 16e) which can reduce flakiness and resource conflicts during CI/local runs.

Author: VoxDroid

Makefile

@@ -19,13 +19,15 @@ test:
 		-project CycleOne.xcodeproj \
 		-scheme CycleOne \
 		-destination 'platform=iOS Simulator,name=iPhone 16e,OS=latest' \
+		-parallel-testing-enabled NO \
 		-resultBundlePath TestResults.xcresult
 
 test-ui:
 	xcodebuild test \
 		-project CycleOne.xcodeproj \
 		-scheme CycleOneUITests \
-		-destination 'platform=iOS Simulator,name=iPhone 16e,OS=latest'
+		-destination 'platform=iOS Simulator,name=iPhone 16e,OS=latest' \
+		-parallel-testing-enabled NO
 
 clean:
 	rm -rf build/