NSFW worker

I would like to see dedicated worker for NSFW list of NFTs, so we don't need extend denylist with extra tag which is slow in terms of reflection on production ie.

Test collection
- https://canary.kodadot.xyz/rmrk/collection/C46E1CCC37647EC061-NEO

Probably thinking could be merged with (?)
- #63

Start by reading the existing denylist worker and issue #63, then inspect how the test collection C46E1CCC37647EC061-NEO is handled. Define the dedicated NSFW worker's inputs and integration point, and verify that this collection is processed without adding another denylist tag or incurring the described production reflection cost.

Written by the indexing model from the issue text.