fix(P1): ldconfig-index the full LichtFeld build lib tree so the binary loads

lf_stage.sh's flat -type f copy missed symlinked sonames (libusd_*.so) and
external-dep libs (libnvimgcodec.so.0, libOpenMeshCore). COPY the whole build-lf
tree from the CACHED builder stage into /opt/lichtfeld-build and ldconfig-index
every .so dir → binary resolves all libs regardless of RUNPATH. No recompile
(builder stage layer unchanged). Image-size trim (strip .o/.a) is a follow-up.

Co-Authored-By: claude-flow <ruv@ruv.net>

Author: ruvnet

Dockerfile.consolidated

@@ -148,11 +148,20 @@ ENV PATH="/opt/vcpkg:${PATH}"
 # the system GUI/USD runtime libs the binary links so it loads headless (Xvfb).
 RUN mkdir -p /opt/gaussian-toolkit
 COPY --from=lichtfeld-builder /src/build /opt/gaussian-toolkit/build
+# Full LichtFeld build tree (vcpkg USD, nvImageCodec, OpenMesh, liblfs_*) from the
+# CACHED builder stage — every .so dir is ldconfig-indexed so the binary resolves
+# them regardless of RUNPATH/symlinks (lf_stage.sh's flat copy missed symlinked
+# sonames + external-dep libs). Copying from the cache means NO recompile.
+COPY --from=lichtfeld-builder /src/build-lf /opt/lichtfeld-build
 RUN apt-get update && apt-get install -y --no-install-recommends \
         libgtk-3-0 libgdk-pixbuf-2.0-0 libglib2.0-0 libgomp1 \
         libwayland-client0 libwayland-cursor0 libwayland-egl1 libxkbcommon0 \
         libdecor-0-0 libibus-1.0-5 libdbus-1-3 libsystemd0 libglu1-mesa \
-    && rm -rf /var/lib/apt/lists/*
+    && rm -rf /var/lib/apt/lists/* \
+    && { echo /opt/gaussian-toolkit/build; \
+         find /opt/lichtfeld-build \( -name '*.so' -o -name '*.so.*' \) \
+              -exec dirname {} \; | sort -u; } > /etc/ld.so.conf.d/lichtfeld.conf \
+    && ldconfig
 ENV PATH="/opt/gaussian-toolkit/build:${PATH}"
 
 # ---------------------------------------------------------------------------