Fix stale require cache in TTY allocation tests

Add beforeEach hook to clear require cache before each test runs.
This ensures each test gets a fresh module evaluation with the
correct TTY values, preventing the first test from using a stale
cached module loaded by compose.spec.js.

Author: cursoragent

test/tty-allocation.spec.js

@@ -22,6 +22,12 @@ describe('TTY allocation', () => {
   const originalStdinIsTTY = process.stdin.isTTY;
   const originalStdoutIsTTY = process.stdout.isTTY;
 
+  beforeEach(() => {
+    // Clear require cache so compose.js re-evaluates with test-set TTY values
+    delete require.cache[require.resolve('./../lib/compose')];
+    delete require.cache[require.resolve('./../utils/build-docker-exec')];
+  });
+
   afterEach(() => {
     // Restore after each test
     process.stdin.isTTY = originalStdinIsTTY;