Discard any changes before we delete the persistent state

[laevandus]

🎯 Goal

Make sure that changed managed object contexts do not trigger adding new data in removeAllData

📝 Summary

In the state layer branch we have a case where channel was not properly deleted on logout. That branch also has additional managed object context which is aggressively merging changes from other contexts (this seems to be related).

1. Log in with A
2. Open channel with A and B
3. Logout and log in with B
4. Open channel with A and B → issue happens (assert telling multiple ChannelDTOs for the same cid)

🛠 Implementation

Reset contexts when we logout for making sure we discard any active changes and do not try to save them when later the code path calls writableContext.save.

🎨 Showcase

From: feature/chat-state-layer

🧪 Manual Testing Notes

Follow the steps above.

☑️ Contributor Checklist

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

[Stream-SDK-Bot]

StreamChat XCMetrics

target	metric	benchmark	branch	performance	status
MessageList	Hitches total duration	10 ms	3.34 ms	66.6% 🔼	🟢
	Duration	2.6 s	2.55 s	1.92% 🔼	🟢
	Hitch time ratio	4 ms per s	1.31 ms per s	67.25% 🔼	🟢
	Frame rate	79 fps	78.66 fps	0.43% 🔼	🟢
	Number of hitches	1	0.4	60.0% 🔼	🟢
ChannelList	Hitches total duration	12.5 ms	0.0 ms	100.0% 🔼	🟢
	Duration	2.6 s	0.83 s	68.08% 🔼	🟢
	Hitch time ratio	5 ms per s	0.0 ms per s	100.0% 🔼	🟢
	Frame rate	76 fps	62.81 fps	17.36% 🔼	🟢
	Number of hitches	1.2	0.0	100.0% 🔼	🟢

[laevandus]

I will hold this one until we have released 4.53.0.

[sonarqubecloud[bot]]

Quality Gate passed

Issues
66 New issues
0 Accepted issues

Measures
0 Security Hotspots
83.7% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud