multichain-feed and email-service improvement

[SamuelPull]

Checklist

• [x] I have followed (at least) the PR section of the contributing guide.
• [x] I fixed all necessary PR warnings
• [x] The commit history is clean
• [x] The E2E tests are passing
• [x] If possible, the issue has been divided into more subtasks
• [x] I did a self review before requesting a review from another team member

Description

How to test

1. <E.g. login as user XYZ>
2. <E.g. try to create new subproject>
3. <E.g. You should not see error in console>
4. ...

Closes #1817

[openkfwCI]

	Notes	Time
:white_check_mark:	Note for Reviewer: E2E tests on pipeline 59021 on remote server succeeded	Mon, 13 May 2024 07:54:57 +0000

Generated by E2E-Test

[github-actions[bot]]

	Warnings
:warning:	No CHANGELOG added.

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