将最小解释器验证改为fixture驱动

结论：最小解释器 harness 改为读取 G-code fixture，并通过 expected canonical event fixture 验证 G0/G1/feed 输出，后续扩展覆盖可直接新增 fixture。检查：git diff --check 通过；wasm-port/tests/native/verify_native_probes.sh 通过。

wasm-port/tools/build_native_probes.sh

@@ -7,6 +7,7 @@ BUILD_DIR="$ROOT_DIR/build/native"
 WRAP_DIR="$ROOT_DIR/runtime/core/linuxcnc_wrap"
 SHIM_DIR="$ROOT_DIR/runtime/core/shims"
 INCLUDE_DIR="$ROOT_DIR/runtime/core/include"
+MINIMAL_GCODE_FIXTURE="$ROOT_DIR/tests/fixtures/gcode/minimal_linear.ngc"
 
 mkdir -p "$BUILD_DIR"
 
@@ -130,7 +131,7 @@ echo "$INTERP_MIN_RC" > "$BUILD_DIR/linuxcnc_interp_minimal_harness.exitcode"
 
 if [[ "$INTERP_MIN_RC" -eq 0 ]]; then
   set +e
-  "$BUILD_DIR/linuxcnc_interp_minimal_harness" \
+  "$BUILD_DIR/linuxcnc_interp_minimal_harness" "$MINIMAL_GCODE_FIXTURE" \
     >"$BUILD_DIR/linuxcnc_interp_minimal_harness.run.stdout.log" \
     2>"$BUILD_DIR/linuxcnc_interp_minimal_harness.run.stderr.log"
   INTERP_MIN_RUN_RC=$?