feat(cache): enable radix prefix sharing, chunk cache reuse, and 32GB disk-backed slot persistence

scripts/start-server.sh

@@ -41,8 +41,12 @@ exec /opt/llama.cpp-xrip/build-nccl/bin/llama-server \
   -ngl 99 \
   -c 131072 \
   --parallel 1 \
+  --cache-prompt \
+  --cache-reuse 64 \
+  --cache-idle-slots \
+  --slot-prompt-similarity 0.10 \
+  --cache-ram 32768 \
   --slot-save-path /var/cache/llama-slots \
-  --cache-ram 16384 \
   --split-mode tensor \
   --flash-attn on \
   --batch-size 2048 \