Sellerlogic Endpoints

Router prefix: /sellerlogic → full base: /api/v1/multi/sellerlogic

Summary: Credentials and helper endpoints interacting with Sellerlogic pricing APIs. Used by FBM/FBA repricing flows.

Implementation: backend/service_multi-repricer/app/api/v1/endpoints/sellerlogic.py

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TODO: Populate detailed method table and examples.