[Prod] Strip whitespace from beginning and end of string when creating RTR objectives, improve RSS feed processing, properly save source on RTR

[thewatermethod]

Description of change

• RTR goal form did not strip leading or trailing whitespace from objective titles. This can lead to unintentional duplicates
• RTR goal form was incorrectly setting goal source in the frontend.
• RSS feed processing uses a different approach that honors the markup and layout in confluence

How to test

• Create a goal/objective on the RTR with extra space at the end of the objective. Use that goal/objective on the AR and confirm on the RTR that there is only one RTR
• Set a goal with root causes/source on the RTR and save it. Confirm that you don't get an error.
• View Confluence help drawers and confirm that the content is readable (it may need reworking to match initial design)

Issue(s)

• https://jira.acf.gov/browse/TTAHUB-3409
• https://jira.acf.gov/browse/TTAHUB-3364

Checklists

Every PR

• Meets issue criteria
• JIRA ticket status updated
• Code is meaningfully tested
• Meets accessibility standards (WCAG 2.1 Levels A, AA)
• API Documentation updated
• Boundary diagram updated
• Logical Data Model updated
• Architectural Decision Records written for major infrastructure decisions
• UI review complete

Before merge to main

• OHS demo complete
• Ready to create production PR

Production Deploy

• Staging smoke test completed

After merge/deploy

• Update JIRA ticket status