Docker: trim runtime image payload (#40307)

* Docker: shrink runtime image payload

* Docker: add runtime pnpm opt-in

* Docker: collapse helper entrypoint chmod layers

* Docker: restore bundled pnpm runtime

* Update CHANGELOG.md

scripts/docker/install-sh-e2e/Dockerfile

@@ -9,8 +9,7 @@ RUN apt-get update \
   && rm -rf /var/lib/apt/lists/*
 
 COPY install-sh-common/version-parse.sh /usr/local/install-sh-common/version-parse.sh
-COPY run.sh /usr/local/bin/openclaw-install-e2e
-RUN chmod +x /usr/local/bin/openclaw-install-e2e
+COPY --chmod=755 run.sh /usr/local/bin/openclaw-install-e2e
 
 RUN useradd --create-home --shell /bin/bash appuser
 USER appuser