[build-tools] Classify Argent session artifacts by MIME type

[szdziedzic]

Why

Currently all argent screenshots and recordings are classified as other type on website

How

Use mime type of argent artifacts to select correct kind and make it display nicely on website

Test Plan

Tests

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 62.47%. Comparing base (9827171) to head (d1fd9d5).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4154      +/-   ##
==========================================
+ Coverage   62.47%   62.47%   +0.01%     
==========================================
  Files        1008     1008              
  Lines       45772    45778       +6     
  Branches     9631     9632       +1     
==========================================
+ Hits        28590    28596       +6     
  Misses      15721    15721              
  Partials     1461     1461              

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[gwdp]

🔥

[github-actions]

✅ Thank you for adding the changelog entry!

[github-actions]

🤖 AI code review

Decision: Approve

Overall PR risk: Low. The change is additive: it adds a MIME-type-to-kind lookup so uploadArgentArtifactAsync sends a classified kind value instead of always undefined. The affected surface is limited to labeling and grouping of Argent artifacts on the simulator session page. The kind value comes from a fixed allowlist map, and mimeType is validated as a string before the lookup, so there is no injection or credential exposure risk. No reviewer reported a critical or warning finding, so no code-level defects survived to report.

No findings.

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This review is advisory — it never blocks a merge and never auto-approves.