Add handler for GET /pins?cids=baf1,...,bafN

[olizilla]

we need to handle batch pin status requests where the list of CIDs to check are passed as a comma separated string of cids under the key cids in the URLSearchParams

it's used by the cron-pins scheduled task that runs regularly to poll cluster to see if the pins that were previously Queued are have changed state yet via the cluster client lib cluster.statusAll

• cron-pins job where it is called via cluster.statusAll - https://github.com/web3-storage/web3.storage/blob/272c83b860c5d15a48c05d3cedb2063b26ca8abe/packages/cron/src/jobs/pins.js#L174
• the implementation of cluster.statusAll - https://github.com/nftstorage/ipfs-cluster/blob/02a4c1d0f4cbe86557abd738be83bb2de25ccec0/src/index.js#L189

[olizilla]

This is deployed to staging but currently throws an error if more than 1 CID is passed as the cids search param.

[codeflyer]

As discussed, the issue was due a timeout in the lambda.

the deploy was set to a 10 second value. Moved it to 60 seconds to be sure.
The bottleneck is in the cluster, we don't have control on it.

The pickup performance instead are really fast.

[olizilla]

@codeflyer the aws http gateway times out after 30s max waiting for a lambda to respond.
https://docs.aws.amazon.com/apigateway/latest/developerguide/limits.html#http-api-quotas

We can probably set the lambda timeout to 31s. the request will have already been closed if it takes longer.