Refactor: Improve pinning implementation to meet spec compliance

[en0ma]

This PR does a refactor of the pinning implementation to make sure it is compliant with the pinning spec

NB: I have done the manual testing as well using the compliance audit tool

closes #275

[10d9e]

This is awesome. Maybe not for this PR, but do you think it would be possible to include an adhoc Pinning Service Compliance check that we could put into the pipeline?

[en0ma]

This is awesome. Maybe not for this PR, but do you think it would be possible to include an adhoc Pinning Service Compliance check that we could put into the pipeline?

If we are to implement this, It would require cloning the compliance repo and running the audit against a running estuary server on the pipeline.

Also, the compliance team intends to add a pipeline where, as they improve the requirements and checks, it runs against pinning services prod API and notifies (creates an issue) on the service repo.

[alvin-reyes]

LGTM

[SgtPooki]

This is awesome. Maybe not for this PR, but do you think it would be possible to include an adhoc Pinning Service Compliance check that we could put into the pipeline?

This is a great feature request. I opened ipfs-shipyard/pinning-service-compliance#140 to track it