fix(argv): bypass Commons Exec internal argument trimming

The first repair left 11 real-child assertions failing because CommandLine.Argument
trims its stored value even with handleQuoting=false. Preserve a separate literal
vector at the native launch boundary; do not relax whitespace/newline assertions.
No implicit shell parsing, quoting, or substitution is added.

Author: loong10k

src/main/java/io/github/easy4j/opencli/core/LiteralCommandLine.java

@@ -0,0 +1,46 @@
+package io.github.easy4j.opencli.core;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import org.apache.commons.exec.CommandLine;
+
+/**
+ * Internal literal argv bridge. Commons Exec's Argument constructor trims even
+ * when handleQuoting is false, so raw values cannot be stored in its argument list.
+ * Keep the original vector and supply it directly to the native launcher instead.
+ *
+ * @author <a href="https://github.com/loong10k">Loong Wan</a>
+ * @since 3.0.0
+ */
+final class LiteralCommandLine extends CommandLine {
+    private final List<String> literalArguments = new ArrayList<>();
+
+    LiteralCommandLine(String executable) {
+        super(executable);
+    }
+
+    @Override
+    public CommandLine addArgument(String argument, boolean handleQuoting) {
+        if (handleQuoting) {
+            throw new IllegalArgumentException("Literal argv does not support implicit quoting");
+        }
+        literalArguments.add(Objects.requireNonNull(argument, "argument"));
+        return this;
+    }
+
+    @Override
+    public String[] getArguments() {
+        return literalArguments.toArray(new String[0]);
+    }
+
+    @Override
+    public String[] toStrings() {
+        String[] result = new String[literalArguments.size() + 1];
+        result[0] = getExecutable();
+        for (int i = 0; i < literalArguments.size(); i++) {
+            result[i + 1] = literalArguments.get(i);
+        }
+        return result;
+    }
+}

src/main/java/io/github/easy4j/opencli/core/OpenCliExecutor.java

@@ -112,7 +112,7 @@ private CommandLine buildCommandLine(List<String> adapterAndRest) {
         if (OpenCliStrings.isBlank(exe)) {
             throw new IllegalStateException("opencli.executable must not be blank");
         }
-        CommandLine cmd = new CommandLine(exe.trim());
+        CommandLine cmd = new LiteralCommandLine(exe.trim());
         appendLiteralArgs(cmd, properties.getLeadingArguments(), "leadingArguments");
         appendLiteralArgs(cmd, adapterAndRest, "adapterAndRest");
         return cmd;