bonsai fork skew patches

The bonsai backend reuses backend/cpp/llama-cpp/grpc-server.cpp (written against LocalAI's pinned upstream llama.cpp) but compiles it against the PrismML prism fork, which branched from upstream some commits earlier. Any upstream API change that the shared gRPC server depends on, but that the fork does not yet carry, is back-ported here as a *.patch file and applied to the cloned fork checkout by ../apply-patches.sh.

CI treats both this directory and backend/cpp/llama-cpp/ as Bonsai inputs, since the wrapper copies and builds the shared llama.cpp backend sources.

Rules:

• One upstream commit (or minimal hunk) per patch, named NNNN-short-description.patch.
• Patches are applied with git apply from the fork's checkout root.
• apply-patches.sh fails fast if a patch stops applying cleanly — that is the signal the fork has caught up (or diverged), so re-cut or drop the patch.
• Keep this set as small as possible; the long-term fix is the fork rebasing onto a newer upstream (or Q1_0/Q2_0 landing in mainline llama.cpp, retiring this backend entirely).