Addresses feedback from PR #582 review comment about unnecessary variable usage when checking script exit codes.

Changes

• Replaced three-line exit handling pattern with single-line || exit
• Removed all RESULT variable assignments

Before:

$SCRIPT_DIR/publish_to_alpha.sh;
RESULT=$?;
[[ ${RESULT} != 0 ]] && exit ${RESULT};

After:

$SCRIPT_DIR/publish_to_alpha.sh || exit;

The || exit pattern preserves exit codes correctly: when a command fails, exit without arguments uses the exit status of that failed command (last command executed).

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