Fix MOV attachment mime type encoding

[b-onc]

🎯 Goal

Android SDK wasn't able to parse our video attachments.

🛠 Implementation

It turned out that iOS reports the file name uppercased (eg TRIMMED_FILE123.MOV) and we couldn't detect it was a video (MOV) so we encoded it as generic (octet-stream)

🧪 Testing

Enable logs and upload a video attachment, check the encoded mime type.

☑️ Checklist

• I have signed the Stream CLA (required)
• Changelog is updated with client-facing changes
• New code is covered by unit tests
• Affected documentation updated (docusaurus, tutorial, CMS (task created)

[codecov]

Codecov Report

Merging #1604 (5224467) into main (0411596) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1604      +/-   ##
==========================================
+ Coverage   85.28%   85.31%   +0.03%     
==========================================
  Files         232      232              
  Lines       10932    10936       +4     
==========================================
+ Hits         9323     9330       +7     
+ Misses       1609     1606       -3     

Flag	Coverage Δ
llc-tests	85.31% <100.00%> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...treamChat/Models/Attachments/AttachmentTypes.swift	86.66% <100.00%> (+0.95%)	⬆️
Sources/StreamChat/Utils/Logger/Logger.swift	58.53% <0.00%> (+1.82%)	⬆️

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