CI：降低 QEMU 编译并行度(-j2) 缓解内存压力，冒烟阶段加内存诊断

ci/Dockerfile

@@ -48,9 +48,9 @@ RUN --mount=type=secret,id=gitea_token \
 #-----------------------------------------------------------------------
 WORKDIR /opt/moos-ivp
 
-RUN ./build-moos.sh -m -j"$(nproc)" && \
+RUN ./build-moos.sh -m -j2 && \
     make -C build/MOOS/MOOSCore install && \
-    ./build-ivp.sh -n -j"$(nproc)" && \
+    ./build-ivp.sh -n -j2 && \
     make -C build/ivp install && \
     ldconfig
 
@@ -75,7 +75,7 @@ RUN --mount=type=secret,id=gitea_token \
     git clone --depth 1 "https://zjk:${TOKEN}@gitea2.zhaojingkui.xyz/zjk/googletest.git" /opt/googletest; \
     mkdir -p /opt/googletest/build && cd /opt/googletest/build && \
     cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_GMOCK=ON .. && \
-    make -j"$(nproc)" && \
+    make -j2 && \
     make install && \
     ldconfig