fix(deps): commons-exec 1.4.0→1.6.0——1.4.0 的 stdin 泵在 JDK 8 触发 Stream closed 竞态（CI 实证 exit=-1 stdout 空）；同步还原临时诊断断言

Author: loong10k

pom.xml

@@ -47,7 +47,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <!-- Dependency versions -->
         <additionalparam>-Xdoclint:none</additionalparam>
-        <commons-exec.version>1.4.0</commons-exec.version>
+        <commons-exec.version>1.6.0</commons-exec.version>
         <jackson-bom.version>2.18.9</jackson-bom.version>
         <junit.version>5.11.4</junit.version>
         <junit-jupiter.version>5.11.4</junit-jupiter.version>

src/test/java/io/github/easy4j/codex/CodexClientTest.java

@@ -466,9 +466,7 @@ void shouldDelegateLogout() {
 
     @Test
     void shouldDelegateLoginVariants() {
-        CodexCliResult apiKeyLogin = echoClient().loginWithApiKey("sk-test");
-        assertTrue(apiKeyLogin.getStdout().contains("--with-api-key"),
-                "exit=" + apiKeyLogin.getExitCode() + " stdout=[" + apiKeyLogin.getStdout() + "] stderr=[" + apiKeyLogin.getStderr() + "]");
+        assertTrue(echoClient().loginWithApiKey("sk-test").getStdout().contains("--with-api-key"));
         assertTrue(echoClient().loginWithAccessToken("tok-1").getStdout().contains("--with-access-token"));
         assertTrue(echoClient().loginDeviceAuth().getStdout().contains("--device-auth"));
         assertTrue(echoClient().loginStatus().getStdout().contains("status"));

src/test/java/io/github/easy4j/codex/cli/CodexCliTest.java

@@ -344,19 +344,15 @@ void shouldDelegateLogout() {
     @Test
     void shouldDelegateLoginWithApiKey() {
         CodexCliResult result = echoCli().loginWithApiKey("sk-test");
-        assertTrue(result.getStdout().contains("login"),
-                "exit=" + result.getExitCode() + " stdout=[" + result.getStdout() + "] stderr=[" + result.getStderr() + "]");
-        assertTrue(result.getStdout().contains("--with-api-key"),
-                "stdout=[" + result.getStdout() + "]");
+        assertTrue(result.getStdout().contains("login"));
+        assertTrue(result.getStdout().contains("--with-api-key"));
     }
 
     @Test
     void shouldDelegateLoginWithAccessToken() {
         CodexCliResult result = echoCli().loginWithAccessToken("tok-123");
-        assertTrue(result.getStdout().contains("login"),
-                "exit=" + result.getExitCode() + " stdout=[" + result.getStdout() + "] stderr=[" + result.getStderr() + "]");
-        assertTrue(result.getStdout().contains("--with-access-token"),
-                "stdout=[" + result.getStdout() + "]");
+        assertTrue(result.getStdout().contains("login"));
+        assertTrue(result.getStdout().contains("--with-access-token"));
     }
 
     @Test