Persisted Queries Plugin

[ardatan]

Related #1038 (comment)
This PR adds the support for unofficial APQ Spec
https://github.com/apollographql/apollo-link-persisted-queries#apollo-engine

[github-actions]

The latest changes of this PR are available as canary in npm (based on the declared changesets):

@graphql-yoga/[email protected]
@graphql-yoga/[email protected]
[email protected]
@graphql-yoga/[email protected]
@graphql-yoga/[email protected]
@graphql-yoga/[email protected]
@graphql-yoga/[email protected]

[github-actions]

✅ Benchmark Results

     ✓ no_errors
     ✓ expected_result

     checks.........................: 100.00% ✓ 97178       ✗ 0    
     data_received..................: 13 MB   431 kB/s
     data_sent......................: 5.6 MB  186 kB/s
     http_req_blocked...............: avg=2.53µs   min=1.1µs   med=2µs     max=3.02ms  p(90)=2.6µs    p(95)=3.1µs   
     http_req_connecting............: avg=55ns     min=0s      med=0s      max=2.71ms  p(90)=0s       p(95)=0s      
   ✓ http_req_duration..............: avg=479.32µs min=216.7µs med=381µs   max=24.02ms p(90)=627.8µs  p(95)=830.39µs
       { expected_response:true }...: avg=479.32µs min=216.7µs med=381µs   max=24.02ms p(90)=627.8µs  p(95)=830.39µs
     http_req_failed................: 0.00%   ✓ 0           ✗ 48589
     http_req_receiving.............: avg=37.82µs  min=16.2µs  med=30µs    max=6.51ms  p(90)=47.2µs   p(95)=70µs    
     http_req_sending...............: avg=15.25µs  min=5.6µs   med=9.7µs   max=5.73ms  p(90)=21µs     p(95)=25.5µs  
     http_req_tls_handshaking.......: avg=0s       min=0s      med=0s      max=0s      p(90)=0s       p(95)=0s      
     http_req_waiting...............: avg=426.23µs min=190.1µs med=333µs   max=23.89ms p(90)=558.92µs p(95)=750.61µs
     http_reqs......................: 48589   1619.524486/s
     iteration_duration.............: avg=608.12µs min=280.2µs med=500.5µs max=27.29ms p(90)=791.03µs p(95)=1.02ms  
     iterations.....................: 48589   1619.524486/s
     vus............................: 1       min=1         max=1  
     vus_max........................: 1       min=1         max=1  

[SirensOfTitan]

I've been playing with this and it feels pretty great! The only small issue that I've stumbled upon is that a PersistedQueryNotFound error results in a 500, but in the apollo-server implementation (which I'm assuming as reference), results in a 200 with a cache header, see:

https://github.com/apollographql/apollo-server/blob/444c403011209023b5d3b5162b8fb81991046b23/packages/apollo-server-core/src/requestPipeline.ts#L578-L582

[ardatan]

Oh i think my other PR that returns 200 even for the errors would solve this! Good catch!