Add wait loops to ensure containers are fully removed before restarting.
This fixes race conditions where docker compose would fail because an
existing container was still being cleaned up.
Changes:
- StartProxy: Add explicit stop, wait loop before docker compose up
- StopProxy: Add wait loop after container removal
- Both actions now poll up to 10 seconds for complete removal
- Add error suppression to handle non-existent containers gracefully
Tests:
- Add StartProxyTest.php with 3 tests for cleanup logic
- Add StopProxyTest.php with 4 tests for stop behavior
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
