fix(indexer): ipfs pinning performance

[mjlescano]

This PR:

1. Adds a unique ID for pinning jobs, avoiding re-pinning/uploading-to-s3 of cids. This was mostly important for packages that are used by several projects.
2. Adds an in-memory cache for s3 requests, which greatly reduces requests to it.
3. Refactors the workers on the indexer, will easily allow on the future to add new workers on their own files, and not having to think about concurrency, etc.

[changeset-bot]

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Latest commit: af6f294

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