chore(vllm-cpp): pin vllm.cpp to the merged ABI v9 tip

974d9d72 was the pre-merge commit on the feature branch. eec09bed is the merged
main tip carrying the same ABI v9 surface, and is the tree the capi suite
(31/31) and the Go ABI handshake were actually verified against.

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
Assisted-by: Claude Code:claude-opus-5 [ClaudeCode]

Author: mudler

backend/go/vllm-cpp/Makefile

@@ -11,7 +11,7 @@ JOBS?=$(shell nproc --ignore=1 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || e
 
 # vllm.cpp version
 VLLM_CPP_REPO?=https://github.com/mudler/vllm.cpp
-VLLM_CPP_VERSION?=974d9d72c2365d20dc76dbce4a98fddac32525c0
+VLLM_CPP_VERSION?=eec09bed5a03457837b499781c23d8e44f106813
 
 # The backend consumes only the stable C ABI (libvllm + include/vllm.h), so the
 # server, examples and tests of the engine are never built here.