fix(buun-llama-cpp): backport logit_bias_eog field to grpc-server copy

LocalAI's shared grpc-server.cpp reaches
ctx_server.get_meta().logit_bias_eog twice (the twin params_from_json_cmpl
callsites). That accessor was added to server_context_meta upstream after
buun's 2026-04-05 fork-point, so compiling against buun errors with
  'struct server_context_meta' has no member named 'logit_bias_eog'.

Rewrite the call sites — only in the buun grpc-server.cpp copy — to source
the vector from params_base.sampling.logit_bias_eog instead. That vector is
the underlying data the upstream meta accessor eventually returns (buun
still carries common_params_sampling::logit_bias_eog at common.h:280), so
the substitution yields identical behavior on both trees.

The sed is guarded by a grep for the call site, so this patch is
self-disabling once buun rebases past the upstream refactor.

Assisted-by: Claude:Opus-4.7 [Read] [Edit] [Bash] [WebFetch]
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

Author: mudler

backend/cpp/buun-llama-cpp/patch-grpc-server.sh

@@ -125,6 +125,21 @@ else
     echo "==> DFlash option-handler patch OK"
 fi
 
+if grep -q 'ctx_server\.get_meta()\.logit_bias_eog' "$SRC"; then
+    echo "==> patching $SRC to source logit_bias_eog from params_base.sampling (buun predates server_context_meta::logit_bias_eog accessor)"
+    # Upstream llama.cpp exposes logit_bias_eog through server_context_meta
+    # after buun's 2026-04-05 fork-point. Buun still carries the underlying
+    # data on common_params_sampling::logit_bias_eog (the struct field the
+    # meta accessor eventually returns). Rewriting the call site to read
+    # params_base.sampling.logit_bias_eog works against both trees — upstream
+    # still populates that same vector the newer accessor returns.
+    sed 's/ctx_server\.get_meta()\.logit_bias_eog/params_base.sampling.logit_bias_eog/g' "$SRC" > "$SRC.tmp"
+    mv "$SRC.tmp" "$SRC"
+    echo "==> logit_bias_eog substitution OK"
+else
+    echo "==> $SRC has no ctx_server.get_meta().logit_bias_eog call, skipping logit_bias_eog patch"
+fi
+
 if grep -q 'get_media_marker()' "$SRC"; then
     echo "==> patching $SRC to replace get_media_marker() with legacy \"<__media__>\" literal"
     # Only one call site today (ModelMetadata), but replace all occurrences to