[Fix]Empty session ids during livestream

[ipavlidakis]

🔗 Issue Links

Resolves https://stream-io.atlassian.net/browse/PBE-6305

📝 Summary

In some cases we noticed in backend logs that iOS devices connect with empty sessionIds. Even though we haven't been able to reproduce it, this revision attempts to eliminate most code paths that set the sessionId to an empty string.

☑️ Contributor Checklist

• [x] I have signed the Stream CLA (required)
• [x] This change follows zero ⚠️ policy (required)
• [x] This change should receive manual QA
• [ ] 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]

SDK Size

title	develop	branch	diff	status
StreamVideo	7.44 MB	7.44 MB	0 KB	🟢
StreamVideoSwiftUI	2.18 MB	2.18 MB	0 KB	🟢
StreamVideoUIKit	2.31 MB	2.31 MB	0 KB	🟢
StreamWebRTC	8.69 MB	8.69 MB	0 KB	🟢

[sonarcloud[bot]]

Quality Gate passed

Issues
114 New issues
0 Accepted issues

Measures
0 Security Hotspots
78.4% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud