fix(security): properly test Windows ACL audit for config includes

The test expected fs.config_include.perms_writable on Windows but
chmod 0o644 has no effect on Windows ACLs. Use icacls to grant
Everyone write access, which properly triggers the security check.

Also stubs execIcacls to return proper ACL output so the audit
can parse permissions without running actual icacls on the system.

Adds cleanup via try/finally to remove temp directory containing
world-writable test file.

Fixes checks-windows CI failure.

src/security/audit.test.ts

@@ -857,12 +857,19 @@ describe("security audit", () => {
 
     const includePath = path.join(stateDir, "extra.json5");
     await fs.writeFile(includePath, "{ logging: { redactSensitive: 'off' } }\n", "utf-8");
+    if (isWindows) {
+      // Grant "Everyone" write access to trigger the perms_writable check on Windows
+      const { execSync } = await import("node:child_process");
+      execSync(`icacls "${includePath}" /grant Everyone:W`, { stdio: "ignore" });
+    } else {
       await fs.chmod(includePath, 0o644);
+    }
 
     const configPath = path.join(stateDir, "clawdbot.json");
     await fs.writeFile(configPath, `{ "$include": "./extra.json5" }\n`, "utf-8");
     await fs.chmod(configPath, 0o600);
 
+    try {
       const cfg: ClawdbotConfig = { logging: { redactSensitive: "off" } };
       const user = "DESKTOP-TEST\\Tester";
       const execIcacls = isWindows
@@ -902,6 +909,10 @@ describe("security audit", () => {
           expect.objectContaining({ checkId: expectedCheckId, severity: "critical" }),
         ]),
       );
+    } finally {
+      // Clean up temp directory with world-writable file
+      await fs.rm(tmp, { recursive: true, force: true });
+    }
   });
 
   it("flags extensions without plugins.allow", async () => {