Include action name and form data in action approval emails

[suraj-ranganath]

Summary

Approver and requester emails for requestable actions were too generic to act on without opening the request. Approvers could not see the action being asked for, and requesters saw copy that just said an "action" was submitted.

This change:

• Stores Action Name (from the tool catalog) and form data (submitted public arguments) on access requests
• Renders both the approver email and the requester confirmation email from that payload
• Omits the form-data section when no form was submitted
• Redacts secret-like fields and HTML-escapes values
• Shows Action Name, form data, and both email subjects on the existing approval cards so reviewers do not have to click through

Approver subject: Approval needed: {Action Name}
Requester subject: {Action Name} submitted for approval

Customer evidence

• Automation Request Email Details for Action Approvals

Testing

cd platform && python3 -m unittest test_action_request_emails.py

12 tests covering action names, form-data extraction/redaction, approver/requester copy, HTML escaping, and request enrichment.