Add input video and request ID to Transcode API Task outputs

[leszko]

Related Linear: https://linear.app/livepeer/issue/VID-102/add-metrics-to-transcode-api-tasks

FYI: @ecmulli

[codecov]

Codecov Report

Merging #180 (26c33cf) into main (5f22c6e) will increase coverage by 0.23869%.
The diff coverage is 90.90909%.

@@                 Coverage Diff                 @@
##                main        #180         +/-   ##
===================================================
+ Coverage   12.91800%   13.15669%   +0.23869%     
===================================================
  Files             14          14                 
  Lines           2183        2189          +6     
===================================================
+ Hits             282         288          +6     
  Misses          1880        1880                 
  Partials          21          21                 

Impacted Files	Coverage Δ
task/upload.go	12.26611% <90.90909%> (+1.10822%)	⬆️

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Impacted Files	Coverage Δ
task/upload.go	12.26611% <90.90909%> (+1.10822%)	⬆️