Fix issue with approval count not reflecting saved value

[cigamit]

This fixes an issue where, when editing an Approval Node, the values for "Required approvals", "On timeout", and "Context Template" where not properly reflecting the values that were saved previously.

[Copilot]

Pull request overview

This PR fixes workflow Approval Node editing in the UI/API by ensuring the node’s summary_fields.unified_job_template includes the saved Approval Template configuration values (so previously-saved “Required approvals”, “On timeout”, and “Context Template” can be reliably displayed when re-opening/editing a node).

Changes:

• Extend WorkflowJobTemplateNodeSerializer.get_summary_fields() to include required_approvals, on_timeout, and context_template for Approval nodes (in addition to timeout).
• Add a functional API test asserting these fields are returned via the workflow node detail endpoint after creating an approval template on a node.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
awx/main/tests/functional/api/test_workflow_node.py	Adds a functional test to verify approval template values are present in workflow node summary_fields after creation.
awx/api/serializers.py	Populates additional Approval Template fields (required_approvals, on_timeout, context_template) in workflow node summary_fields for Approval nodes.