fx build fix

ci/scripts/proto/generate.sh

@@ -8,6 +8,18 @@ API_DIR="${REPO_ROOT}/api"
 PROTO_DIR="./proto"
 PROTOC_BIN="${PROTOC:-protoc}"
 PROTOC_INCLUDE="${PROTOC_INCLUDE:-/usr/include}"
+if [ ! -f "${PROTOC_INCLUDE}/google/protobuf/timestamp.proto" ]; then
+  for candidate in /usr/include /usr/local/include /usr/lib/include /usr/local/share/include; do
+    if [ -f "${candidate}/google/protobuf/timestamp.proto" ]; then
+      PROTOC_INCLUDE="${candidate}"
+      break
+    fi
+  done
+fi
+if [ ! -f "${PROTOC_INCLUDE}/google/protobuf/timestamp.proto" ]; then
+  echo "[proto] failed to locate google/protobuf well-known types; set PROTOC_INCLUDE" >&2
+  exit 1
+fi
 
 if ! command -v "${PROTOC_BIN}" >/dev/null 2>&1; then
   echo "[proto] protoc binary not found" >&2