L1s return 500s most of the time

[lidel]

https://protocollabs.grafana.net/d/d6FxxgJ4k/bifrost-gw-metrics?orgId=1&from=now-24h&to=now&refresh=1m

[lidel]

Mystery solved:

We proxy lassie status codes. 500 seems to be a really common error, so don't treat it like the L1 is erroring or w/e.

Error (500): Failed to fetch cid: query failed: failed to dial 12D3KooWDAHxZiMuQwX4Hwn4Rctje9RWWJB6FxhAa6aTuitTqmVx:
Error (500): Failed to fetch cid: no candidates

I think if it timeouts / cant find the content it should be adjusted to 504, allowing caboose to use it in weighting logic (filecoin-saturn/caboose#26)

[guanzo]

Should be fixed by filecoin-project/lassie@0f647ea