api: add isTestUser flag

[iameli]

Useful for filtering test streams out of Prometheus data and not much else.

[vercel]

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Name	Status	Preview	Updated
livepeer-studio	✅ Ready (Inspect)	Visit Preview	Oct 6, 2022 at 2:39PM (UTC)

[victorges]

LGTM

[victorges]

Is the idea to set these directly on the DB? I'm fine with that actually, but could you also add an internal boolean field here? I created that so @ecmulli could filter out internal Livepeer users from the usage queries (not always we use our @livepeer.org emails lol).

Since you're adding this here, might as well add that other one.

[iameli]

Done!

[codecov]

Codecov Report

Merging #1329 (6119f85) into master (7769111) will decrease coverage by 0.06811%.
The diff coverage is 100.00000%.

@@                 Coverage Diff                 @@
##              master       #1329         +/-   ##
===================================================
- Coverage   51.95067%   51.88256%   -0.06812%     
===================================================
  Files             68          68                 
  Lines           4460        4462          +2     
  Branches         833         834          +1     
===================================================
- Hits            2317        2315          -2     
- Misses          1848        1851          +3     
- Partials         295         296          +1     

Impacted Files	Coverage Δ
packages/api/src/controllers/stream.ts	49.36709% <100.00000%> (+0.16073%)	⬆️
packages/api/src/webhooks/cannon.ts	47.36842% <0.00000%> (-2.33918%)	⬇️

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Impacted Files	Coverage Δ
packages/api/src/controllers/stream.ts	49.36709% <100.00000%> (+0.16073%)	⬆️
packages/api/src/webhooks/cannon.ts	47.36842% <0.00000%> (-2.33918%)	⬇️