fix(dag): Add cmd_timeout to prepare_ansible task to prevent SSH timeout

The prepare_ansible task in freeipa_deployment DAG was failing with
"SSH command timed out" because it lacked a cmd_timeout parameter.

The task runs ansible-galaxy to install FreeIPA collections which can
take several minutes. Without an explicit timeout, it was using the
SSH default (~10 seconds).

Added cmd_timeout=600 (10 minutes) to match other long-running tasks
like create_freeipa_vm and wait_for_vm.

Root cause analysis from E2E run #20752912398:
- Task 'prepare_ansible' failed with AirflowException: SSH command timed out
- This caused 'install_freeipa' and 'validate_freeipa' to be skipped
- FreeIPA VM was created but never configured

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

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: tosin2013

airflow/dags/freeipa_deployment.py

@@ -327,6 +327,7 @@ def decide_action(**context):
     echo ""
     echo "[OK] Ansible preparation complete"
     """,
+    cmd_timeout=600,  # 10 minutes for ansible-galaxy collection install
     dag=dag,
 )