A GraphQL Federation directive for Subgraph-level compliance: @openfed__requireFetchReasons

In the context of GraphQL Federation, the @requires directive poses a significant compliance risk by potentially allowing sensitive information to leak between subgraphs, undermining security controls. To address this issue, the @openfed__requireFetchReasons directive has been introduced, enabling subgraph owners to specify an allowlist of subgraphs that can access sensitive fields such as minimumPrice. This measure enhances compliance by making data access explicit and auditable, simplifying the process for organizations subject to strict data governance regulations. Unlike authorization, which controls user-level access, this directive focuses on ensuring that sensitive fields are not exposed across subgraphs without explicit consent, thereby turning compliance challenges into a manageable, declarative issue. This approach not only streamlines compliance audits by defining dependencies and rules directly within the schema but also highlights the importance of understanding service dependencies in microservice architectures.