docker, ci: swap GB DeepEP source from fzyzcjy fork to deepseek-ai/DeepEP@hybrid-ep (#25113)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

scripts/ci/cuda/ci_install_deepep.sh

@@ -99,11 +99,10 @@ apt-get install -y --no-install-recommends libfabric-dev || {
 DEEPEP_DIR=/root/.cache/deepep
 rm -rf ${DEEPEP_DIR}
 if [ "$GRACE_BLACKWELL" = "1" ]; then
-    # We use Tom's DeepEP fork for GB200 for now, which supports fp4 dispatch.
-    GRACE_BLACKWELL_DEEPEP_BRANCH=gb200_blog_part_2
-    git clone https://github.com/fzyzcjy/DeepEP.git ${DEEPEP_DIR} && \
+    GRACE_BLACKWELL_DEEPEP_BRANCH=hybrid-ep
+    git clone https://github.com/deepseek-ai/DeepEP.git -b ${GRACE_BLACKWELL_DEEPEP_BRANCH} ${DEEPEP_DIR} && \
     pushd ${DEEPEP_DIR} && \
-    git checkout ${GRACE_BLACKWELL_DEEPEP_BRANCH} && \
+    git checkout d28bd676c2120573c9f1425f0c16c39faa4117e6 && \
     sed -i 's/#define NUM_CPU_TIMEOUT_SECS 100/#define NUM_CPU_TIMEOUT_SECS 1000/' csrc/kernels/configs.cuh && \
     popd
 else