feat: add parent proposal to a proposal

[martin-trajanovski]

Description

This PR aims to show the parent proposal in the proposal details view and also test the functionality with the e2e tests.

Motivation

There was a feature requested to add new field on a proposal called parent proposal and it needs to be shown in the proposal details page

Fixes:

• https://jira.ess.eu/browse/SWAP-4298

Tests included

• Included for each change/fix?
• Passing? (Merge will not be approved unless this is checked)

Documentation

• swagger documentation updated [required]
• official documentation updated [nice-to-have]

official documentation info

If you have updated the official documentation, please provide PR # and URL of the pages where the updates are included

Backend version

• Does it require a specific version of the backend
• which version of the backend is required:

Summary by Sourcery

Add functionality to display parent proposals in the proposal detail view and update the proposal fetching logic to encode proposal IDs for API access. Update Swagger documentation and include end-to-end tests for the new feature.

New Features:

• Introduce functionality to fetch and display parent proposals in the proposal detail view.

Enhancements:

• Enhance proposal fetching logic by encoding proposal IDs to ensure proper API access.

Documentation:

• Update Swagger documentation to reflect the new parent proposal feature.

Tests:

• Add end-to-end tests to verify the functionality of displaying parent proposals in the proposal detail view.

[sourcery-ai]

Hey @martin-trajanovski - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟡 General issues: 1 issue found
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟡 Complexity: 2 issues found
• 🟢 Documentation: all looks good

---

Sourcery is free for open source - if you like our reviews please consider sharing them ✨

• X
• Mastodon
• LinkedIn
• Facebook

_{Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.}