fix: video asset preview and size (WPB-24809)

[sbakhtiarov]

https://wearezeta.atlassian.net/browse/WPB-24809

https://wearezeta.atlassian.net/browse/WPB-24809

What's new in this PR?

Issues

Issues with showing video preview and duration:

1. Duration is not showing for video previews
2. Preview and message size do not match the video aspect ratio

Causes (Optional)

1. Missing mapping for the video metadata.
2. Video metadata not read when sending video.
3. Local path for uploaded video file not resolved correctly

Solutions

Added missing mappings (kalium)
Read video file metadata before sending
Fixed local path resolution for Uploaded video assets

Before:
https://github.com/user-attachments/assets/b9094869-0eb6-4e6d-9aca-3410afa107c4

After:
https://github.com/user-attachments/assets/27b6925a-ed60-4c0e-bd16-1392a611e7f9

[codecov]

Codecov Report

❌ Patch coverage is 62.22222% with 17 lines in your changes missing coverage. Please review.
✅ Project coverage is 51.10%. Comparing base (ee482be) to head (4d902ed).

Files with missing lines	Patch %	Lines
.../conversations/sendmessage/SendMessageViewModel.kt	51.72%	10 Missing and 4 partials ⚠️
...s/messages/item/ConversationAssetPathsViewModel.kt	80.00%	1 Missing and 2 partials ⚠️

❌ Your patch check has failed because the patch coverage (62.22%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #4803      +/-   ##
===========================================
- Coverage    51.12%   51.10%   -0.02%     
===========================================
  Files          610      610              
  Lines        21093    21089       -4     
  Branches      3399     3392       -7     
===========================================
- Hits         10783    10778       -5     
- Misses        9295     9299       +4     
+ Partials      1015     1012       -3     

Files with missing lines	Coverage Δ
...ersations/messages/item/AssetLocalPathViewModel.kt	70.83% <100.00%> (-1.59%)	⬇️
...ersations/model/messagetypes/video/VideoMessage.kt	0.00% <ø> (ø)
...s/messages/item/ConversationAssetPathsViewModel.kt	74.19% <80.00%> (+14.73%)	⬆️
.../conversations/sendmessage/SendMessageViewModel.kt	76.98% <51.72%> (-2.87%)	⬇️

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

See analysis details on SonarQube Cloud