Fail iOS build when Addressables runtime data is missing (#7424)

ci/github_actions/build_unity_ios.sh

@@ -59,6 +59,20 @@ if [ $UNITY_EXIT_CODE -ne 0 ]; then
     exit $UNITY_EXIT_CODE
 fi
 
+if [ ! -f "$LOG_PATH" ]; then
+    echo ""
+    echo "ERROR: Unity exited successfully but did not write an editor log at $LOG_PATH"
+    exit 1
+fi
+
+if [ ! -f "$BUILD_PATH/Data/Raw/aa/settings.json" ]; then
+    echo ""
+    echo "ERROR: iOS player is missing Addressables runtime data at:"
+    echo "  $BUILD_PATH/Data/Raw/aa/settings.json"
+    echo "Build Addressables before packaging the player so Addressables can initialize at runtime."
+    exit 1
+fi
+
 # Fail the build if any prefab references are broken — this produces a player
 # that launches but has null Inspector fields, which is hard to debug.
 if grep -q "Missing Prefab" "$LOG_PATH"; then