Enable jemalloc heap profiling with libunwind backtraces

Build libunwind 1.8.3 as a static library before jemalloc, then
configure jemalloc with --enable-prof --enable-prof-libunwind so the
static libjemalloc.a can dump heap profiles with accurate stack
traces.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Sd7pBDVxQENBX1CP2z6Lip

debian13/Dockerfile

@@ -551,6 +551,21 @@ 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=v1.8.3 --depth=1 https://github.com/libunwind/libunwind.git src \
+    && cd src \
+    && autoreconf --install \
+    && CFLAGS=-fPIC ./configure --prefix=/usr/local \
+        --disable-shared \
+        --enable-static \
+        --disable-tests \
+        --disable-documentation \
+        --disable-minidebuginfo \
+        --disable-zlibdebuginfo \
+    && make --jobs="$(nproc)" \
+    && make install \
+    && cd .. \
+    && rm -rf src
+
 RUN git clone --branch=5.3.1 --depth=1 https://github.com/jemalloc/jemalloc.git src \
     && cd src \
     && ./autogen.sh \
@@ -558,6 +573,8 @@ RUN git clone --branch=5.3.1 --depth=1 https://github.com/jemalloc/jemalloc.git
         --disable-doc \
         --disable-shared \
         --enable-static \
+        --enable-prof \
+        --enable-prof-libunwind \
     && make --jobs="$(nproc)" \
     && make install \
     && cd .. \