fix: nsight-systems-cli from devtools repo (not in CUDA 13 devel)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

infra/docker/Dockerfile.ci-builder

@@ -55,8 +55,12 @@ RUN curl -fsSL https://downloads.rclone.org/v1.69.1/rclone-v1.69.1-linux-amd64.z
 RUN rustup component add clippy
 
 # Nsight Systems CLI — GPU profiling for CUDA graph node-level traces
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    nsight-systems-cli \
+# Not in the CUDA 13 devel repo — install from NVIDIA's nsight-systems repo
+RUN curl -fsSL https://developer.download.nvidia.com/devtools/repos/ubuntu2404/amd64/nvidia-devtools-keyring_2024.1.gpg \
+    -o /usr/share/keyrings/nvidia-devtools.gpg \
+    && echo "deb [signed-by=/usr/share/keyrings/nvidia-devtools.gpg] https://developer.download.nvidia.com/devtools/repos/ubuntu2404/amd64/ /" \
+    > /etc/apt/sources.list.d/nvidia-devtools.list \
+    && apt-get update && apt-get install -y --no-install-recommends nsight-systems-cli \
     && rm -rf /var/lib/apt/lists/*
 
 # CUDA env