Build jemalloc from source instead of via package manager

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QKAbAkPvqqKCRZKXtZAvTx

debian13/Dockerfile

@@ -550,4 +550,16 @@ RUN git clone --branch=1.3.15 --depth=1 https://github.com/sewenew/redis-plus-pl
     && cmake --build build --parallel "$(nproc)" --target install \
     && rm -rf build src
 
+RUN git clone --branch=5.3.1 --depth=1 https://github.com/jemalloc/jemalloc.git src \
+    && cd src \
+    && ./autogen.sh \
+    && CFLAGS=-fPIC ./configure --prefix=/usr/local \
+        --disable-doc \
+        --disable-shared \
+        --enable-static \
+    && make --jobs="$(nproc)" \
+    && make install \
+    && cd .. \
+    && rm -rf src
+
 CMD ["/bin/bash"]