fix: updates type to prevent type error

[nichgalzin]

Relates #376

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review on my code
• [x] I have made corresponding changes to the documentation (if any were needed)
• [x] My changes generate no new warnings or errors
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and previously existing unit tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules

Description

Closes #376

This PR fixes a type error to mirror a change made to the v1-merge to main branch that was preventing that branch from being deployed and merged properly.

Files changed

• types/messagingTypes.ts - adds partner_has_deleted property to type to correctly reflect the data that is being fetch from the web-socket when a new conversation is being added when a user is on the conversation page.

UI changes

n/a

Changes to Documentation

n/a

Tests

n/a

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