Fix batch deleting current user while it has muted users attached to it

[laevandus]

🎯 Goal

Describe why we are making this change.

📝 Summary

CurrentUserDTO.mutedUsers's deletion rule was changed from cascade to nullify. This in turn requires that relationships have the optional check enabled in the model, which we did not have the deletion rule change. This triggered the error.

🛠 Implementation

[ChatClient.swift:496] [logout(completion:)] > Logging out current user failed with error Error Domain=NSCocoaErrorDomain Code=134050 "Constraint trigger violation: Batch delete failed due to mandatory MTM nullify inverse on CurrentUserDTO/mutedUsers" UserInfo={NSExceptionOmitCallstacks=true, NSLocalizedFailureReason=Constraint trigger violation: Batch delete failed due to mandatory MTM nullify inverse on CurrentUserDTO/mutedUsers, _NSCoreDataOptimisticLockingFailureConflictsKey=( )}

🎨 Showcase

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Before	After
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🧪 Manual Testing Notes

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☑️ Contributor Checklist

• I have signed the Stream CLA (required)
• This change should be manually QAed
• Changelog is updated with client-facing changes
• Changelog is updated with new localization keys
• New code is covered by unit tests
• Comparison screenshots added for visual changes
• Affected documentation updated (docusaurus, tutorial, CMS)

🎁 Meme

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[github-actions]

	1 Message
📖	There seems to be app changes but CHANGELOG wasn't modified. Please include an entry if the PR includes user-facing changes. You can find it at CHANGELOG.md.

Generated by 🚫 Danger

[Stream-SDK-Bot]

SDK Size

title	develop	branch	diff	status
StreamChat	7.06 MB	7.06 MB	0 KB	🟢
StreamChatUI	4.96 MB	4.96 MB	0 KB	🟢

[Stream-SDK-Bot]

SDK Performance

target	metric	benchmark	branch	performance	status
MessageList	Hitches total duration	10 ms	3.34 ms	66.6% 🔼	🟢
	Duration	2.6 s	2.54 s	2.31% 🔼	🟢
	Hitch time ratio	4 ms per s	1.31 ms per s	67.25% 🔼	🟢
	Frame rate	75 fps	78.66 fps	4.88% 🔼	🟢
	Number of hitches	1	0.4	60.0% 🔼	🟢

[Stream-SDK-Bot]

SDK Size

title	develop	branch	diff	status
StreamChat	7.06 MB	7.06 MB	0 KB	🟢
StreamChatUI	4.96 MB	4.96 MB	0 KB	🟢

[sonarcloud]

Quality Gate passed

Issues
168 New issues
0 Accepted issues

Measures
0 Security Hotspots
83.7% Coverage on New Code
0.1% Duplication on New Code

See analysis details on SonarQube Cloud