Fix CI test failure: use uv-managed ansible in test script

The test script was calling ansible-playbook directly instead of 'uv run ansible-playbook',
which caused it to use the system-installed ansible that doesn't have access to the
netaddr dependency required by the ansible.utils.ipmath filter.

This fixes the CI error: 'Failed to import the required Python library (netaddr)'

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

tests/test-local-config.sh

@@ -54,7 +54,7 @@ EOF
 
 # Run Ansible in check mode to verify templates work
 echo "Running Ansible in check mode..."
-ansible-playbook main.yml \
+uv run ansible-playbook main.yml \
     -i "localhost," \
     -c local \
     -e @test-config.cfg \